Patent Publication Number: US-10788279-B2

Title: Chambering device for an automatic firearm, and an automatic firearm equipped with the chambering device

Description:
FIELD OF THE INVENTION 
     The present invention relates to a chambering device for an automatic firearm according to the preamble of claim  1 . 
     The invention also relates to an automatic firearm equipped with such a chambering device. 
     In this document, position terms such as “up,” “down,” “front,” and “rear,” etc. relate to an automatic firearm in which the bore axis is horizontal, and rounds are fired toward the front, away from the shooter. 
     A chambering device chambers rounds in an automatic firearm, using a loading lever to ready it for firing. The functional sequence in firing and automatically reloading an automatic firearm can be broken down as follows: 
     There is a breechblock assembly in the receiver that can move longitudinally therein for firing shots, extracting a spent cartridge shell, and reloading. For firing a shot, the breechblock assembly, in particular the breechblock head, guides the uppermost cartridge from the magazine into a chamber in the barrel in the known manner. When a trigger mechanism is actuated, a firing pin strikes the base of the cartridge and ignites a charge, such that a projectile is shot out of the cartridge shell through the barrel. When the projectile passes through the barrel, the propellant in a gas operated chambering device released during the firing process is diverted into a gas discharge. The diverted propellant is used in the known manner to return the breechblock assembly. The propellant drives the breechblock assembly back toward the stock at a high speed via the discharge and a gas piston rod coupled thereto. 
     There is an extractor on the breechblock head that grips the edge of the cartridge at the base, and pulls it out of the chamber as the breechblock assembly returns. An ejector then pushes the shell out of the receiver in the known manner, through a cartridge ejection window. As the breechblock assembly returns, it slides over the magazine toward the stock. As it subsequently moves forward, the breechblock head again pulls the uppermost cartridge from the magazine, and places it in the chamber, and the cycle is repeated. Alternatively, a recoil loading mechanism can be used in the known manner for this cycle. 
     For chambering a round, the upper surfaces of the magazine rear wall and front wall each have a recess extending to a certain length on their upper ends. The side walls of a magazine are extended upward, and form so-called magazine lips, which prevent cartridges from falling out of the magazine. A spring in the magazine forces the cartridge feed upward in the magazine housing, thus pushing the cartridges upward to the magazine lips. 
     With so-called open breechblock automatic firearms, the breechblock (breechblock carrier and breechblock head) are in a forward position prior to firing, i.e. the breechblock head is locked in place in the chamber. When a first or new magazine is inserted in the automatic firearm, the chambering of rounds described above is then carried out. 
     With a so-called closed breechblock, the breechblock can be brought to a rear position by means of the loading lever, where it is held in place by the triggering mechanism. 
     Known chambering devices are often attached to the breechblock, and the breechblock can be moved backward, thus toward the stock, by means of the loading lever, such that the breechblock is moved backward over the magazine, counter to the force of the recoil spring. As the breechblock subsequently moves forward, the breechblock head takes the uppermost cartridge from a magazine and pushes it forward into the chamber. 
     A chambering device lever permanently coupled to the breechblock is provided, by way of example, in the known G36 by the applicant, as well as in the known SA 80. Such a loading lever is also known as a conjoint movement loading lever, because it moves back and forth along with the breechblock carrier that it is coupled to. When the loading lever protrudes from the firearm, it can injure the shooter. When the protruding lever collides with an obstruction, this can obstruct chambering. Such a fixed assembly on the breechblock is known presently in both military as well as civilian automatic firearms. 
     Non-conjoint movement chambering devices are also known from the AR15 variations, e.g. the HK 416/417 by the same applicant. It is also known that the loading lever can be mounted on and removed from the chambering device without tools. 
     Chambering devices had already been developed before the First World War, in which the chambering device was decoupled from the breechblock after chambering a round. Because of this decoupling, it was disadvantageously impossible to close the breechblock with the loading lever if it did not close properly. 
     In general, a number of different types of chambering devices are known for automatic firearms, which may also contain a loading lever, which is located on either the right or left side of the firearm. 
     By way of example, a non-conjoint movement slide, which is attached to one side of the firearm, and can only be operated from one side, is known from DE 101 22 345 C1 by the same applicant, in particular for the M64, by means of which the breechblock is tensioned in place by a closing spring. There is an oblong slot in the receiver with a clamping track, in which the slide is guided and can be secured in place. 
     A chambering device, e.g. for the HK416 is also known from DE 10 2006 006 034 B3 by the same applicant, in which the loading lever can be operated ambidextrously via two handles. Actuation of one of the handles automatically releases the safety for the second handle, in order to chamber rounds. 
     A chambering device for an automatic handgun, in particular the known G36, with a pivoting and latching chambering device is also known from EP 0 489 024 B1 by the same applicant. This is mounted directly, or via an intermediate component, on the breechblock, and can be pivoted away from the receiver on both sides of the longitudinal axis of the breechblock. 
     Restrictions for military weapons have increased, e.g. regarding ambient temperature, weapon temperature, contaminants, sustained firing, etc. As a result, in certain circumstances, a cartridge may not be fully chambered, or some other loading obstruction may arise. If there is a loading obstruction, the breechblock system may not be able to be closed properly without additional manipulation, such that the shooter may be at risk of injury. Although these obstructions are extremely rare, a military weapon should be as free of obstructions as possible. With such a chambering device, the breechblock can often be operated manually, thus eliminating any chambering obstructions. 
     A chambering device with a non-conjoint movement loading lever is known from U.S. Pat. No. 7,798,045 B1, wherein the loading lever is provided with handles projecting from the left and right sides. This cannot be disassembled without tools, and also cannot be operated ambidextrously. The chambering device comprises a slide with a hook on the end facing the breechblock carrier, which engages in a corresponding recess on the breechblock carrier, in order to guide it forward, toward the chamber, functioning as a closing aid. 
     Chambering devices are known from U.S. Pat. No. 9,109,848 B2, 8,156,854 B2 and 8,561,517 B2, requiring tools for mounting it on either the left or right side. The automatic firearms disclosed therein comprise a receiver and a hand guard attached thereto, wherein the chambering device is incorporated in the hand guard. The loading lever can be pivoted between a standby position and an actuation position, wherein it engages with a hole in the gas piston rod when in the actuation position as well as when functioning as a closing aid. The chambering device thus does not act directly on the breechblock carrier. In an alternative design, the chambering device is provided with actuation handles on both sides. 
     U.S. Pat. No. 8,307,747 B2 discloses another non-conjoint movement chambering device with a chambering slide that has a spring loaded catch-lug that engages with the breechblock carrier. The chambering device lever extends rigidly from the side of the firearm. In its function as a closing aid, the catch-lug engages in the breechblock carrier and pushes it forward. U.S. Pat. No. 8,539,871 B1 discloses a similar chambering device. 
     FR 1,349,766 and the parallel German patent DE 1 208 221 disclose a chambering device with a non-conjoint movement loading slide, which can be coupled directly to the breechblock carrier via a locking pin. The chambering device is located on top of the firearm, comprises a spring loaded central slide handle, that acts either in a purely spring loaded manner via a threaded connection or via a pivoting lever on a locking element, and moves it from a standby position to its operating position, in which the slide can be coupled directly to the breechblock carrier. This chambering device cannot be switched between right-hand and left-hand operation without tools. 
     Furthermore, DE 199 03 321 A1 and the parallel US 2002/0046642 by the same applicant disclose a chambering device for a handgun. The loading lever can be switched without tools, is mounted directly in the breechblock, and is thus configured for conjoint movement. The loading lever cannot pivot, and therefore extends laterally from the firearm. 
     EP 0 207 058 B1 discloses a non-conjoint movement, one-sided chambering device with a loading lever that cannot be switched, and can be pivoted laterally. When chambering rounds, the loading lever acts on the end of a longitudinal rod in the breechblock via a slider. When functioning as a closing aid, the loading lever likewise engages with the longitudinal rod via the slider. 
     Lastly, U.S. Pat. No. 3,686,998 discloses a pivotal loading lever, which does not move conjointly while chambering a round. A slider acts directly on the breechblock. When used as a closing aid, the pivotal loading lever latches onto a loading lever extension via an oblong hole on its axle and a hook provided thereon. It cannot be disassembled without tools. 
     OBJECT OF THE INVENTION 
     With this background, the object of the invention is to create an alternative, structurally simple and functionally reliable chambering device for chambering rounds in an automatic firearm. 
     This object is achieved by the respective subject matter of the independent claims  1  and  19 . 
     The chambering device for an automatic firearm specified in the introduction is also distinguished in that the loading lever handle can be pivoted from a standby position to an actuation position and back in the loading lever retainer, and the loading lever retainer can be mounted in and removed from the loading lever housing without tools, on either the left or right side. 
     The automatic firearm according to claim  19  is characterized in that it is equipped with such a chambering device. 
     The loading lever retainer can be selectively mounted in and removed from the loading lever housing on the left or right side. In particular because it can be mounted and removed without tools, an ambidextrous chambering device can be obtained with structurally simple means, which can be adapted to the ergonomics of the shooter, and thus to a left or right handed operator. The ambidextrousness is currently a frequently demanded criteria in official requirements. 
     Furthermore, the chambering device, in particular the loading lever can be positioned optimally in relation to the loading lever housing from an ergonomic perspective, such that the aiming of the automatic firearm can be easily maintained while chambering rounds, and the firearm can also be operated from a prone position without raising the body signature. Advantageously, the automatic firearm can also be loaded with the safety on, thus ensuring that the firearm will not be misfired. 
     In a structurally simple design, the loading lever handle can be pivoted over a bearing axle between a standby position and an actuation position in the chambering device. In a simple design, the loading lever axle can be in the form of a pin. 
     The loading lever handle can have a profiled surface, in order to improve its grip, in particular in difficult conditions and/or with gloves. The loading lever handle can also have a casing and/or profile elements on its entirety or in part. In particular a rubber casing improves the feel. Such a casing material can also be provided as a buffering material. 
     The loading lever handle is preferably tensioned in its standby position on the chambering device. 
     In a technologically or structurally simple design, it is tensioned in place by an elastic element, e.g. a spring element. 
     During the chambering process of the automatic firearm, preferably only one bearing surface of the chambering device and/or one end surface of the loading lever housing is releasably connected to the breechblock. 
     The breechblock can be moved backward toward the stock during the chambering via the bearing surface or end surface of the loading lever housing. Advantageously, this is only a form-fitting connection, and supplementary coupling elements needed with the prior art can be eliminated. It is also ensured that the breechblock and the loading lever retainer or loading lever housing, and thus the entire chambering device, are only releasably connected during the chambering process, and not while firing. 
     It is therefore preferred that while firing the automatic firearm, the chambering device is entirely separated from the breechblock. 
     Advantageously, the loading lever is thus secured in place while firing. As a result, the safety of the shooter is increased, in particular in stressful situations. At the same time, the shooter is free to assume any shooting position. Such a loading lever is referred to as a non-conjoint movement loading lever. In comparison with a conjoint movement loading lever, e.g. in the known G36 by the same applicant, or the known SA 80, it is possible to avoid injury to the shooter due to the conjoint movement loading lever. 
     Because the chambering device is entirely separated from the breechblock carrier, it can also be guided separately and locked in place in the receiver. 
     At least one retaining element is also provided on the loading lever, which latches to or on a counter-retaining element on the receiver, such that the loading lever can be secured to the counter-retaining element. 
     In a structurally simple design, the retaining element can be, e.g., a retaining lug on the loading lever, in particular the inner surface thereof, facing the receiver. 
     The retaining element is preferably provided on the loading lever handle, and engages with a complementary counter-retaining element in the receiver, e.g. another retaining lug. Because the loading lever, or its loading lever handle is tensioned in its standby position, it preferably bears on the receiver in this position, wherein its retaining lug engages with the counter-retaining element on the receiver. It can advantageously be ensured in this manner that the chambering device is secured to the receiver during the movement of the breechblock, in particular when firing, thus not moving conjointly. The loading lever bears laterally on the receiver when in the standby position. 
     The loading lever housing can be solid. Preferably at least one hole passes through it longitudinally, provided in particular for receiving a gas piston rod. 
     There can also be other holes, in particular for reducing the weight of the loading lever housing. The longitudinal hole for the gas piston rod is basically complementary to the dimensions of the gas piston rod. 
     The chambering device can preferably be secured in place on the automatic firearm, in particular on the gas piston rod, for manually supported chambering of a round. 
     After it has been secured to the gas piston rod, the chambering device can be moved forward via the loading lever, toward the chamber, by means of which the breechblock coupled to the gas piston rod is automatically moved forward toward the chamber. 
     This function serves as an integrated closing aid, in particular for manually supported chambering of a round. Because the chambering device is separated from the breechblock, a connection or coupling is needed for this manual closing function. 
     The closing aid function eliminates disruptions, e.g. loading disruptions, or for closing the breechblock quietly. 
     In the actuation position, the loading lever handle can be spring loaded toward the receiver. 
     The securing of the chambering device on the gas piston rod can take place via appropriate coupling measures. 
     The chambering device preferably comprises an engagement element that engages in a hole in the gas piston rod, wherein the engagement element can be switched between an engaged position and a released position. 
     When the loading lever handle is in the actuation position, it can be spring loaded toward the receiver. In a simple design, the engagement element can be a spring loaded locking pin, for example, the outer dimensions of which are basically complementary to the hole in the gas piston rod, such that it passes through the loading lever housing, or the slide, thus securing or retaining the chambering device on the gas piston rod. 
     The engagement element is preferably tensioned in its released position via an elastic element provided for this. 
     The elastic element can be an appropriate elastic agent, in particular a spring. 
     The loading lever is in its outward pivoted position when in the engaged position, thus the actuation position, in which it is folded upward, transverse to the direction of firing. The loading lever can be secured in this position via the engaged position. 
     If the breechblock is released from its rear position when the loading lever is pivoted outward and secured in place in its engaged position, a front stop on the loading lever housing can strike a fixed stop in the receiver. In this manner, it is ensured that the loading lever is automatically folded down, and again engages with the counter-retaining element on the receiver, after it has been pivoted into its standby position, in which it extends parallel to the receiver. 
     The loading lever handle can preferably also be slid and/or pivoted into its engaged position only when it is in the actuation position in the loading lever retainer. 
     In this manner, it is ensured that no unintentional connection to the gas piston rod will take place. 
     The loading lever handle is preferably hinged at its end facing the chambering device such that it can pivot about a bearing axle in the loading lever retainer between its standby position and its actuation position, and comprises an oblong hole for this, which encompasses the bearing axle, and extends basically transverse to the longitudinal direction of the chambering device when in the actuation position. 
     In this manner, it is ensured that the bearing axle is guided in the oblong hole. 
     The oblong hole is basically parallel to the receiver in the standby position, and is at basically 90° to the direction of firing when in its actuation position. 
     The loading lever handle can preferably pivot about the end of the oblong hole facing the loading lever housing when pivoted between its standby position and its actuation position, and can be displaced in the oblong hole when the loading lever handle is brought into its engaged position such that the bearing axle bears on the end of the oblong hole away from the loading lever housing. 
     This can be achieved with structurally simple means, and ensures that the overall loading lever handle can be inserted in the defined position, basically over the entire length of the oblong hole in the loading lever retainer, and thus displacing the loading lever handle over a defined distance. 
     The loading lever handle preferably comprises a locking lug on its end facing the loading lever housing, that engages with the engagement element in the standby position. The locking lug is disengaged from the engagement element when the loading lever handle is pivoted into the actuation position, and pivots and/or slides the engagement element toward the loading lever housing. 
     The end of the loading lever handle facing the loading lever housing can be rounded, for example, and have a latching recess that engages with the engagement element when in the standby position. For this, the engagement element can be a locking pin or bolt, for example, in a structurally simple design. The latching position prevents unintentional operation when in the standby position. 
     When in the form of a locking pin or bolt, the undersurface of the pin can have an angled wedge surface, which interacts with the end of the loading lever handle such that when it is pivoted it engages with the wedge surface and pivots or slides the locking pin or bolt toward the gas piston rod. When in the actuation position, which is also combined with the engaged position, the locking pin is then pushed or slid against the gas piston rod such that it engages with the recess provided therein. 
     The loading lever housing preferably has at least one receiver bearing on each side for receiving and coupling the loading lever retainer. 
     As a result, a precisely reproducible, defined working position of the loading lever retainer with the loading lever handle coupled to it can be established with structurally simple means. The loading lever retainer can be placed in the receiver bearing from the side. Alternatively, the loading lever retainer can also be inserted into the corresponding guide section in the loading lever housing from the rear or from the front, depending on where the receiver bearing is located on the loading lever housing. 
     The loading lever retainer can preferably be latched onto the loading lever housing, in particular onto the receiver bearing. 
     In a structurally simple design, a spring loaded pin or bolt can be provided for this. In this manner, it is possible to securely latch the loading lever retainer in place with structurally simple means. 
     The loading lever retainer preferably has a spring loaded disassembly element, the actuation of which to a disassembly position disengages the loading lever retainer from the loading lever housing. 
     By way of example, the disassembly element can be a disassembly slider, the actuation or pulling of which away from the loading lever retainer, preferably counter to the force of a spring, disengages the loading lever retainer from the loading lever housing. 
     The loading lever housing preferably comprises at least one guide section on each side that engages with and is guided in complementary guide rails in the receiver. 
     Particularly preferably there are at least two guide sections on each side, which enable a two-point guidance of the loading lever housing. By way of example, the guide sections can be grooves formed in the loading lever housing, and exhibit inner dimensions that are basically complementary to the guide rails. 
     There is preferably a stop element with a buffer element on the loading lever housing, which strikes a fixed stop in the receiver. When the breechblock moves forward, the loading lever housing strikes the fixed stop in the receiver. 
     The buffer element reduces the impact forces and can be made of a suitable buffering material. 
     Preferably, guide rails extend in the interior of the receiver on both sides, in the longitudinal direction of the receiver, for guiding the breechblock carrier via at least two guide sections provided on both sides of the breechblock carrier, and for guiding the loading lever housing via the at least one guide section formed on each side. 
     The guide rails can be formed as an integral part of the receiver in the production thereof, e.g. through aluminum extrusion. They can also be subsequently placed in the receiver. 
     There is preferably a hole on at least one side of the receiver, through which the loading lever retainer coupled to the loading lever handle can be placed in or removed from the loading lever housing for assembly or disassembly, respectively, and is guided therein while chambering rounds. 
     Recesses forming guide slots are particularly preferably provided on both sides in the receiver. These can be formed with structurally simple means, and also serve to receive the loading lever retainer and the loading lever handle. They can also be used for guiding the loading lever handle inside the receiver with a complementary formation of guide sections on the loading lever retainer. The mounting of the loading lever takes place, e.g. through a window in the receiver, or through the receiving thereof in a T-groove in the loading lever housing, for example. There is preferably at least one counter-retaining element on the receiver, to which the loading lever can be secured during the breechblock movement. 
     In another design, the counter-retaining element can be formed by retaining lugs on the receiver, which are complementary to the retaining elements on the loading lever handle. 
    
    
     
       DESCRIPTION OF THE FIGURES 
       Exemplary embodiments of the invention are explained in greater detail below with reference to the attached schematic drawings. 
       Therein: 
         FIG. 1 a    shows a side view of a section of a receiver with a chambering device placed therein in the standby position; 
         FIG. 1 b    shows a view of the illustration in  FIG. 1 a    from above; 
         FIG. 2 a    shows a perspective view of a first embodiment of the chambering device according to the invention, in a diagonal view from behind and above; 
         FIG. 2 b    shows a perspective view of a second embodiment of the chambering device according to the invention, in a diagonal view from behind and above; 
         FIG. 3 a    shows a perspective side view of a first embodiment of a slide or loading lever housing according to the invention, in a side view from the left; 
         FIG. 3 b    shows a perspective side view of a second embodiment of the slide or loading lever housing according to the invention in a side view from the left and above; 
         FIG. 4 a    shows a side view of the second embodiment of the slide in  FIG. 3 b   , with the loading lever placed thereon in the standby position, in a side view; 
         FIG. 4 b    shows a cross section of the slide in  FIG. 4 a   , cut along the cutting plane I-I; 
         FIG. 4 c    shows a longitudinal sectional illustration cut through the slide in  FIG. 4 a    along the cutting plane II-II; 
         FIG. 5 a    shows a side view of the slide in  FIG. 4 a    with the loading lever folded down at the side; 
         FIG. 5 b    shows a cross section view of the slide in  FIG. 5 a    cut along the cutting plane I-I; 
         FIG. 5 c    shows a longitudinal sectional view cut through the slide in  FIG. 5 a    along the cutting plane II-II, from above; 
         FIG. 6 a    shows a sectional side view of the slide in  FIG. 5 a    with the fully folded out loading lever latched to a gas piston rod; 
         FIG. 6 b    shows a cross section view cut along the cutting plane I-I; 
         FIG. 6 c    shows a longitudinal sectional view of the slide in  FIG. 6 a   , cut along the cutting plane II-II, from above; 
         FIG. 7  shows a sectional view of the slide or loading lever housing in  FIGS. 4 a  to 6 c    with the loading lever retainer bearing on the breechblock carrier in a view from above; 
         FIG. 8  shows a longitudinal sectional view through the loading lever, which shows the loading lever housing or slide in  FIG. 7 , showing the loading lever locked to the gas piston rod in greater detail; 
         FIG. 9  shows a perspective detail view of the slide or loading lever housing in accordance with the second embodiment, in a view from the left and above; 
         FIG. 10  shows a perspective illustration of the slide or loading lever housing with the loading lever inserted; 
         FIG. 11  shows a perspective view of the slide or loading lever housing with the loading lever separated therefrom prior to the coupling; 
         FIG. 12 a    shows a side view of the slide or loading lever housing in  FIG. 9  with the loading lever inserted therein; 
         FIG. 12 b    shows a longitudinal sectional view cut through the slide or loading lever housing in  FIG. 12 a   , cut along the cutting plane I-I; 
         FIG. 12 c    shows a cross section view cut through the slide or loading lever housing in  FIG. 12 a    along the cutting plane II-II; 
         FIG. 13  shows a perspective view of the slide or loading lever housing in  FIG. 11 , with the loading lever placed therein, and not locked in place; 
         FIG. 14 a    shows a side view of the slide or loading lever housing with the loading lever placed therein and locked in place, from the left; 
         FIG. 14 b    shows a longitudinal sectional view cut through the slide or loading lever housing in  FIG. 14 a    along the cutting plane I-I; 
         FIG. 14 c    shows a cross section view cut through the slide or loading lever housing in  FIG. 14 b    along the cutting plane II-II; 
         FIG. 15  shows a perspective view of the slide or loading lever housing with the loading lever placed therein and locked in place; 
         FIG. 16 a    shows an overall view of the loading lever housing according to the second embodiment in a side view from the left, in which the loading lever and the breechblock are in their foremost position (standby position); 
         FIG. 16 b    shows a view from above of the illustration in  FIG. 16   a;    
         FIG. 17 a    shows an overall view of the chambering device in  FIG. 16 a   , without the receiver; 
         FIG. 17 b    shows a view from above of the illustration in  FIG. 17   a;    
         FIG. 18 a    shows an overall view of the chambering device in  FIGS. 16 a  to 17 a   , in which the loading lever and the breechblock are in their rearmost position (chambering position); 
         FIG. 18 b    shows a view from above of the illustration in  FIG. 18   a;    
         FIG. 19 a    shows an illustration of the chambering device in  FIG. 18 a   , without the receiver; 
         FIG. 19 b    shows a view from above of the illustration in  FIG. 19   a;    
         FIG. 20 a    shows a perspective illustration of the slide or loading lever housing of the first embodiment and the corresponding loading lever, shortly before they are coupled; 
         FIG. 20 b    shows the slide in  FIG. 20 a    with the loading lever placed therein, which is not yet latched in place; 
         FIG. 20 c    shows the slide in  FIGS. 20 a  and  b    with the loading lever placed and locked therein; 
         FIG. 21  shows a side view of a receiver for the HK433 by the same applicant; 
         FIG. 22 a    shows a cross section cut through the receiver in  FIG. 21  along the cutting plane A-A; and 
         FIG. 22 b    shows a cross section cut through the receiver in  FIG. 21  along the cutting plane E-E. 
     
    
    
     The construction and the functioning of the chambering device according to the invention shall be explained below with reference to the figures. 
     The reference symbols are not all included in all of the figures, for purposes of clarity. The same reference symbols, however, apply to all of the figures. 
     The chambering device  1  according to the invention substantially comprises the following components: a loading lever  13 ,  13 ′, composed of a loading lever handle  15  and a loading lever retainer  17 , and which can be coupled to a slide or a loading lever housing  59 ,  59 ′, which is inserted into the receiver  3 . 
       FIGS. 16 a  to 19 b    show, among other things, the elements of an automatic firearm necessary for the functioning of the chambering device  1 , which, in the present case, is an assault rifle, specifically the HK433 by the applicant. 
     The HK433 is a so-called indirect gas operated loader with a short stroke gas piston system and a rotating lugged loading lever. The short stroke gas piston transfers an impulse to the breechblock carrier via a piston rod after a round has been fired. A short stroke gas piston is distinguished by a short movement path, which is sufficient for transferring a corresponding drive impulse to the piston rod, or the breechblock assembly. The short stroke gas piston is not permanently connected to a piston rod of the breechblock assembly. The breechblock comprises a breechblock carrier  119  and a breechblock head  172 . The breechblock carrier  119  can move longitudinally in the known manner in the receiver  3  or the upper part thereof. 
       FIGS. 16 a  to 17 b    show the chambering device  1  in the standby position, in which the loading lever housing or slide  59 ,  59 ′ bears with its rear end (bearing surface  121  of the loading lever retainer  17 ) on the front end of the breechblock carrier  119  (cf.  FIGS. 17 a  and 17 b   ). The loading lever handle  15  is close to the front end of the guide slots  7  in the receiver  3 , and is latched in place there via a retaining lug  23  on its inner surface  22 , with a complementary counter-retaining element  24  on the receiver  3 . The breechblock carrier  119  is in its foremost position, in which the breechblock head  172  is locked in place in the chamber  155  (cf.  FIG. 17 a   ). 
     When in this position, a magazine (not shown) can be inserted into the automatic firearm from below in the known manner. 
     The chambering device  1  can be operated to then insert a cartridge (not shown) into the chamber  155 , thus to ready the automatic firearm for firing. For this, a shooter grips the loading lever handle  15  of the loading lever and folds it back and away from the automatic firearm, such that it projects laterally away from the upper part of the receiver  3  at basically a 90° angle in its actuation position (cf.  FIGS. 18 b  and 19 b   ). 
     The chambering device  1  can then be moved backward toward the stock (not shown) via the loading lever handle  15 , wherein the loading lever handle  15  pushes against the slide or loading lever housing  59 ,  59 ′ bearing on the front surface of the breechblock carrier  119 , and thus guides the slide or loading lever housing  59 ,  59 ′ and thus the breechblock carrier  119  counter the pressure of the closing spring  161  (cf.  FIGS. 17 a  and 17 b   ). The loading lever housing or slide  59 ,  59 ′ is pushed into the receiver  3  thereby. 
     The breechblock carrier  119  and the chambering device  1  guiding it are in their rearmost position in  FIGS. 18 a  to 19 b   . When the breechblock carrier  119  is brought into this position, the breechblock head  172  slides over the magazine, as described above. In the subsequent forward movement, it can grip a cartridge (not shown), remove it from the magazine, and insert it into the chamber  155 . When the chambering device  1  moves forward, and the breechblock carrier  119  folds the loading lever handle  15  of the loading lever  13 ,  13 ′ back toward the receiver  3 , and ends up back in its starting position, or standby position (cf.  FIGS. 16 a  and 16 b   ) in which the breechblock head  172  is locked in the chamber  155  in the known manner. The weapon is now ready to fire. 
     If there is a loading obstruction, or an automatic closing of the breechblock system or breechblock carrier  119  is not possible, a shooter can also secure the loading lever handle  15  inside the loading lever retainer  17  and in the gas piston rod  111  via a closing aid pin  125  (cr.  FIGS. 6 c    and  8 ), in a recess  127  provided on both sides of the gas piston rod  111 , such that the loading lever handle  15  does not automatically pivot into its standby position, but instead is secured at basically a right angle thereto. A shooter can then loading lever housing the chambering device  1  forward via the loading lever handle  15 . The loading lever handle  15  then first pivots back to its standby position when it is removed from its latched position, or strikes a fixed stop  109 , secured to the receiver  3  via a fastener screw  6 , when the loading lever moves forward (cf.  FIGS. 4 a  to 6 a    and  9 ). 
     The chambering described above shall now be described in detail with reference to all of the figures. 
       FIG. 1 a    shows an enlarged detail illustration of the receiver  3 . The upper part of the receiver  3  is made of solid aluminum monolithically, and has an integrated Picatinny rail  5  on its upper surface, e.g. in accordance with the NATO standardization agreement. Sights and/or night vision devices can be mounted on the Picatinny rail  5 . The breechblock carrier  119  is inserted into the receiver  3  in the known manner, as with G36 by the applicant, such that a functional safety and reliability of the automatic firearm is ensured. 
     There are receivers  11  on the undersurface  9  of the upper part of the receiver  3 , for attaching the stock and hand guard in the known manner. Longitudinal guide slots  7  are provided on both sides of the upper part of the receiver  3 , in which the chambering device  1  or its loading lever  13 ,  13 ′ can be moved. The loading lever  13 ,  13 ′ comprises the loading lever handle  15  and the loading lever retainer  17 , the details of which are enlarged in  FIGS. 2 a  and 2 b   . The loading lever retainer  17  can be mounted on removed from the automatic firearm on the left side and/or the right side without tools. It is placed in the slide or loading lever housing  59 , 59 ′ thereby (cf. enlarged illustration of the embodiment in  FIGS. 3 a  and 3 b   ). 
     The loading lever  13  is in its standby position in  FIGS. 1 a  and 1 b   , in which it is latched in place via a retaining lug  23  on its inner surface  22  extending toward the receiver with a complementary counter-retaining element  24  on the upper part of the receiver  3 . Because of this latching, the loading lever  13  ( 13 ′) is secured to the upper part of the receiver  3 , such that it does not follow the movement of the breechblock, and instead, the breechblock carrier  119  can move freely and independently. 
     The inner end  20  of the loading lever handle  15  is pivotably supported in the loading lever retainer (cf.  FIGS. 2 a  and 2 b  and 4 a  to 6 c   ,  10 , and  11 ). 
     Because the loading lever  13  ( 13 ′) bears laterally flush against the receiver  3  when it is in its standby position, and is latched in place there, it is also referred to as a non-conjoint movement loading lever  13  ( 13 ′). Because it does not move with the breechblock, the loading lever  13  ( 13 ′) remains in its latched standby position while firing the firearm (cf.  FIGS. 1 a  and 1 b   ). The stationary loading lever  13  ( 13 ′) increases the safety of a shooter and prevents any injury thereto. The shooter is also not limited to any particular posture or shooting position for firing the automatic firearm. The loading lever  13  ( 13 ′) can be moved from the left side to the right side of the weapon, and is therefore ambidextrous. The loading lever  13  ( 13 ′) also has a closing aid function, for a quiet chambering of rounds in the chamber  155  (cf.  FIGS. 6 c    and  8 , etc.). 
       FIG. 2 a    shows a first embodiment of a loading lever  13  according to the invention, and  FIG. 2 b    shows a second embodiment  13 ′. The loading lever  13 ,  13 ′ is shown in its standby or starting position in each case, and is basically in the form of a horizontal “L.” The long leg of the “L” forms the loading lever handle  15 , which can have a rubber casing  21  extending entirely or in part over its outer retaining and handle section. The loading lever handle  15  comprises an outer end  19  and an inner end  20 . There is a retaining lug  23  the inner surface  22  of the loading lever handle  15 , thus the side facing the receiver in the assembled state, for latching the loading lever to the receiver  3 , as described in the introduction. 
     The outer surface facing away from the receiver  3  comprises two slanted surfaces  25  extending longitudinally, basically in the shape of a wedge. These are also beveled via wedge-shaped surfaces  27  toward the outer end  19  of the loading lever handle  15 , toward the front and downward. At the front end, the outer end  19  of the loading lever handle  15  transitions to a basically semicircular cross section, via a rounded undersurface  29  at the inside  22 . 
     The inner end  20  of the loading lever handle is located inside a slot  39  in the loading lever retainer  17  such that it can pivot about a loading lever axle  31 . For this, an oblong hole  33  (cf.  FIGS. 4 c , 5 c , 6 c    and  8 ) passes through an inner end  20  of the loading lever handle  15  in the longitudinal direction. The slot  39  passes horizontally through the loading lever retainer  17  such that the loading lever handle  15  can be pivoted 90 degrees from its starting position or standby position, in which it bears on the receiver  3  and is latched in place there, to an actuation position, in which is protrudes at basically a right angle from the upper part of the receiver. The guide slot  39  is delimited at its outer end via a stop  40 , which also delimits the pivotal movement of the loading lever handle  15 . 
     A disassembly slider  43  adjoins the stop inside the outer contour or upper surface  37  of the loading lever retainer  17 , which can be slid outward, transverse to the longitudinal direction of the loading lever retainer, thus away from the upper part of the receiver  3 . The upper and lower surfaces of the disassembly slider  43  have a profiled structure  44 , to improve the grip, in particular if it is dirty or the shooter is wearing gloves. 
     The disassembly slider  43  can be slid out of the outer surface  37  of the loading lever retainer  17  for disassembling the loading lever  13 ,  13 ′, counter to the force of a disassembly slider spring  45  (cf.  4   c ,  5   c  and  6   c , etc.). The disassembly slider  43  is coupled on the inside to a locking pin  51  via a bearing pin  123  (cf.  FIG. 8 ,  FIGS. 4 c , 5 c , 6 c , 12 b , 12 c    and  13 ). The locking pin  51  can loading lever housing inside a bore hole  53  inside the loading lever retainer  17 . The bearing pin  123  passes basically vertically through the locking pin  51 . Adjacent to the bearing pin  123 , the end of the locking pin  51  is basically pin shaped toward the outer surface of the loading lever retainer  17 , and thus forms a bearing  124  for the disassembly slider spring  45 . The bore hole  53  is a blind hole, such that the disassembly slider spring  45  is braced at its other end on the base of the blind hole  53 , and tensions the locking pin  51  of the disassembly slider  43  inward, toward the upper part of the receiver  3 . This takes place such that the locking pin  51 , as shown in  FIG. 2 a   , protrudes out of the undersurface of the loading lever retainer  17  that faces toward the upper part of the receiver  3 . 
     The functioning of the locking pin  51  and the disassembly slider  43  shall be explained below. There is a circumferential recess  47  in the upper surface  41  of the loading lever retainer  17 , running toward the undersurface thereof  50 , which enables a latching of the loading lever retainer  17  in the slide  59  ( 59 ′) (cf.  FIGS. 3 a  and 3 b   ). The loading lever  13 ,  13 ′ bears with its guide surfaces  46  in the guide slots  7  of the receiver  3  (see  FIGS. 2 a , 2 b   ,  7 ,  10 ,  13 ,  20   a ,  20   b , and  20   c ). Retaining lugs  49  are provided at the ends  50  on the outer circumferential surface of the loading lever retainer  17 . The two outer retaining lugs  49  extend circumferentially about the outer contour of the loading lever retainer  17 , and the middle retaining lug  49  is likewise formed on the opposite, or lower surface of the loading lever retainer  17 , which is not shown. 
     The dimensions of the retaining lugs  49  fit to their complementary retaining lugs  85  in the bearing  83  over the loading lever retainer  17  (cf.  FIG. 3 a   ) such that the loading lever retainer can be placed in the bearing  83  from the outside, on the slide or loading lever housing  59 . The retaining lugs  49  of the loading lever retainer  17  loading lever housing over the retaining lugs  85  of the slide or loading lever housing  59 , until they strike the bearing  83 . In this position, the disassembly slider  43  must also be pulled out, counter to the force of the disassembly slider spring  45 , such that the locking pin  51  no longer extends over the end or the undersurface  50  of the loading lever retainer  17 , but instead is located entirely inside the loading lever retainer  17 . The loading lever can then be slid backward, until its rear retaining lug  49  fully bears in the bearing  83 . 
     In this position, the retaining lugs  49  are offset toward the back of the retaining lugs  85 , and are thus behind them. The locking pin  51  is located opposite a bore hole  87  in the slide or loading lever housing  59 ,  59 ′ (cf.  FIGS. 3 a  and 3 b   ). In this position, the disassembly slider  43  no longer protrudes out of the outer contour  37  of the loading lever retainer  17  ( FIG. 2 a   ), and the front end of the locking pin  51  enters the bore hole  87 , is latched in place therein, and thus secures the loading lever retainer in this position. The disassembly slider is then back in its starting position, shown in  FIG. 2 a   . The disassembly slider spring  45  is no longer tensioned at this point. 
       FIG. 2 b    shows a second embodiment of the loading lever  13  according to the invention, which likewise comprises a loading lever handle  15  and a loading lever retainer  17 . The construction and functioning are substantially identical to the loading lever  13  shown in  FIG. 2 a   . The loading lever handle  15  differs from the first embodiment by a slightly modified outer contour, in which the front, beveled, wedge-shaped surfaces  27  are somewhat longer. On the inner surface  22 , facing the receiver, the retaining lug  23  differs from that in the first embodiment according to  FIG. 2 a   , such that it extends over nearly the entire length of the inner surface. 
     In contrast to the first embodiment according to  FIG. 2 a   , there is a continuous retention ridge  57  on the loading lever retainer here. The retention ridge  57  extends from the rear end of the loading lever retainer  17  in a basically u-shaped path over the outer contour of the end  50  facing the receiver  3 . The retention ridge  57  allows the loading lever  13  to be inserted into a slide or loading lever housing  59 ′, shown in  FIG. 3   b.    
     The loading lever housing  59 ′ comprises a bearing  99  with a rail-like, raised guide slot  103 , parallel to the continuous retention ridge  57 . The loading lever  13 ′ is thus inserted with its retention ridge  57  into the guide slot  103 , and is held in place there. For disassembly, as with the first embodiment, the disassembly slider  43  is pulled out of the loading lever retainer  17 , counter to the spring force of the disassembly slider spring  45 , and the loading lever retainer  17  with its retention ridge  57  can be removed toward the rear from the bearing  99  for the loading lever retainer  17 . For the assembly, it is sufficient to simply insert the loading lever retainer  17  with its retention ridge  57  up to the stop in the bearing  99  for the loading lever retainer  17  and it is latched in place in the guide slot  103 . The spring loaded locking pin  51  slides over its bevel  52  into and over the inner contour of the bearing  99  for the loading lever retainer  17 , and enters the complementary bore  87 . The loading lever retainer  17  is entirely secured and latched in place in this position. 
     The slide or loading lever housing  59  shown in  FIG. 3 a    is attached to or removed from the loading lever  13  in the first embodiment according to  FIG. 2 a   , and is in the form of an aluminum extrusion. There is a ridge  63  formed on the upper surface  61  of the loading lever housing  59 , located in part above the bearings  83  formed on both sides. There is a buffered stop  67  at its front end, thus facing the muzzle of an automatic firearm. This strikes a fixed stop  109  (cf.  FIGS. 4 a , 5 a , 6 a    and  9 ), and limits the movement of the loading lever housing, or slide  59  toward the front, beyond its standby position. There is a basically wave-shaped ridge  69  formed at the rear end of the loading lever housing  59 . The region between the two ridges  63  and  69  removed on the upper surface of the loading lever housing  59  via a large hole  71  for weight reduction. 
     A front loading lever housing guide  73  and a rear loading lever housing guide  75  are provided on each side of the loading lever housing  59 . Both loading lever housing guides comprise upper guide sections  77  and lower guide sections  79 , which engage with guide rails  175  on the inner surface of the upper part of the receiver (cf.  FIGS. 21, 22   a  and  b ). 
     The front and rear loading lever housing guides  73  and  75  collectively form a type of two-point guide, in order to reduce the overall friction of the loading lever housing  49  with respect to the guide rails  175  in the receiver  3 . 
     The bearings  84  for the loading lever retainer  17  extend along both longitudinal sides of the loading lever housing  59 , basically adjoining the front loading lever housing guides  73 . In the first exemplary embodiment shown here, there are retaining lugs  85  formed on the upper surface and lower surface of the outer contour of the bearing  83 . As explained above, the loading lever retainer  17  is placed from the outside thereon, with its complementary retaining lugs  49  between the retaining lugs  85  in the bearing  83 , and inserted therein, and then pushed toward the rear under the retaining lugs  85  in the bearing  83 , until the retaining lugs  49  latch behind the retaining lugs  85 , and the locking pin  51  is located opposite the locking pin bore hole  87  in the loading lever housing  59 , and can enter this hole. 
     There is another through hole  89 , basically in the middle of the bearing  83 , in which a closing aid pin  125  can be inserted. This can be seen in particular in  FIGS. 4 c , 5 c , 6 c    and the enlarged detail illustration in  FIG. 8 . The functioning thereof shall be explained in greater detail in reference to these figures. 
     The upper lateral surfaces  91  of the loading lever housing  59  are slightly beveled where they are adjacent to the bearing  83 , and the undersurfaces of the loading lever housing  59  are likewise cut out in order to reduce weight. There are further cutouts  93  in the longitudinal direction of the loading lever housing  59  on the interior, for further weight reduction. A receiver  95  for the gas piston rod  111  passes longitudinally through the middle of the entire loading lever housing  59 . The undersurface of the loading lever housing  59  is rounded in the front and rear loading lever housing guides  73 ,  75 , as is also the case for the section  98  connecting the two sections  73 ,  75 , which extends longitudinally. This improves the guidance of the loading lever housing  59  and the gas piston rod  111 . 
       FIG. 3 b    shows the second embodiment of the loading lever housing  59 ′ in which the loading lever  13 ′ according to  FIG. 2 b    is placed, and removed from. The loading lever housing  59 ′ likewise comprises front and rear loading lever housing guides  73  and  75  on each side, which have upper and lower guide sections  77  and  79 . The region  107  between the guide slides  73  and  75  is more or less cut out over its circumference. For this reason, in contrast to the first embodiment, there are no further cutouts extending longitudinally in the interior of the loading lever housing  59 ′. 
     There is a buffer bearing  104  on the upper surface of the loading lever housing  59 ′, in the proximity of the front loading lever housing guide  73 , which can engage with a rubber buffer  106  (cf.  FIGS. 4 a , 5 a , 6 a    and  9 ). The rubber buffer  106  can be secured to the buffer bearing  104  via a transverse pin (not shown), that can be inserted in the transverse pin bearing  105 . The buffer  106  strikes the fixed stop  109  on the inner surface of the receiver (cf.  FIGS. 4 a , 5 a , 6 a   , and  9 ), and limits the movement of the chambering device  1 , as in the first exemplary embodiment, such that it cannot move beyond its standby position. 
     There are bearings  99  for the loading lever retainer  17  in  FIG. 2 b    at the rear end of the loading lever housing  59 ′ on both sides. These comprise a continuous, basically u-shaped, guide slot  103 , which engage with the complementary circumferential retention ridge  57 . The loading lever  13 ′ can be inserted from the left and/or right sides, thus ambidextrously, wherein it can be inserted entirely, until reaching a stop in the left or right side bearing  99 . The two bearings  99  each extend to the rear end  101  of the loading lever housing  59 ′. There is a basically square receiver  95  for the gas piston rod  111 , extending longitudinally in the middle of the loading lever housing  59 ′, which passes through the loading lever housing  59 ′ from its rear end  101  to the front surface. The undersurface of the loading lever housing  59 ′ comprises a rounded contour  97 , extending over its entire length, and has a wider cross section in the regions of the front and rear loading lever housing guides  73 ,  75  for the loading lever housing  59 ′. 
       FIGS. 4 a , 5 a  and 6 a    each show a side view of the loading lever housing  59 ′ (second embodiment) in  FIG. 3 b   , with the loading lever  13 ′ mounted thereon, and a section of the breechblock carrier (cf.  FIGS. 4 a , 5 a , and 6 a   ). A gas piston rod  111  of the automatic firearm passes through the loading lever housing  59 ′.  FIGS. 4 b , 5 b , and 6 b    each show a cross section cut along the cutting plane I-I, and  FIGS. 4 c , 5 c  and 6 c    each show a longitudinal section cut along the cutting plane II-II. 
     The loading lever  13 ′ is secured in  FIGS. 4 a  to 4 c    in the associated bearing  99  of the loading lever housing  59 ′ via the loading lever retainer  17 , wherein the locking pin  51  of the disassembly slider  43  is engaged in the associated bore hole  87 . The loading lever handle  15  is latched in  FIG. 4 a    via its loading lever latch or retaining lugs  23  to the receiver (not shown) at the counter-retaining element  24  provided there, and secured in place. When the breechblock carrier  119  moves, the loading lever  13  thus does not move with it. The rubber buffer  106  is secured on the upper surface of the loading lever housing  59 ′ via a transverse pin (not shown) in the transverse pin bearing  105  on the buffer bearing  104 . The rubber buffer  106  bears on the fixed stop  109  of the receiver (not shown herein), and limits a forward movement of the chambering device  1 . There is a breechblock carrier guide  120  on the front end of the breechblock carrier  119  for guidance thereof on a guide rail  175  (cf.  FIGS. 21, 22   a, b ) on the inner surface of the receiver  3 . The breechblock guide  120  is likewise formed on both sides of the breechblock  119 . 
     The loading lever housing  59 ′ is slid onto the gas piston rod  111  over the front end  115  thereof, and it passes through the loading lever housing  59 ′, such that it can move longitudinally therein. The rear end  113  of the gas piston rod  111  (cf.  FIG. 8  and  FIGS. 4 c , 5 c  and 6 c   ) is placed in the middle of a complementary cut out  117  in the front end of the breechblock carrier  119 , secured in the known manner via a threading (not shown), and secured by a transverse pin  117 . The loading lever retainer  17  bears at its rear bearing surface  121  on the front end of the breechblock carrier  119 . 
     The loading lever handle  15  is folded away from the loading lever housing  59 ′, toward the back, into its actuation position, in  FIGS. 5 a , 5 b  and 5 c   . The loading lever handle  15  can be pivoted about the loading lever axle  31 , counter to the force of the spring  35 , and is guided thereby into the rear end of the oblong hole  33 . The locking pin  51  of the disassembly slider  43  engages in the associated hole  87  in the loading lever housing  59 ′. 
     The closing aid pin  125  is also shown in  FIGS. 4 b  and 4 c   , as well as the parallel  FIGS. 5 b , 5 c  and 6 b , 6 c   , which can move inside a bore hole  55  inside the loading lever retainer  17 , transverse to the longitudinal direction of the automatic firearm, and parallel to the locking pin. The closing aid pin  125  comprises an inner end  129 , facing the gas piston rod  111 , and which can engage in a recess  127  in the gas piston rod  111 . The closing aid pin  125  is encompassed by a spring  137 , which is braced at one end on a projection on the closing aid pin  125  and braced at its end facing the loading lever housing  59 ′ on a closing aid spring bearing  138 , which tensions the closing aid pin  125  toward the loading lever axle  31 . 
     In the standby position of the loading lever  13  shown in  FIGS. 4 a  to 4 c   , a wedge shaped end section  131  of the closing aid pin  125  engages with a locking latch  34  on the inner end  20  of the loading lever handle  15  above the oblong hole  33 , basically having the shape of a rounded trapezoid. This locking latch  34  provides a supplementary retention of the loading lever handle  15  in its locked standby position. 
     When the loading lever handle  15  is pivoted out of its standby position shown in  FIGS. 5 a  to 5 c   , the loading lever latch  23  is disengaged from the counter-retaining element  24  on the receiver  3 , and the loading lever handle  15  is folded down, about 80 to 85 degrees to the gas piston rod  111 . As shown in  FIGS. 4 b , 5 b , and 6 c   , the bearing axle  31  is encompassed by a spring  35 , which also tensions the loading lever handle  15  in its standby position. The transition to the actuation position (cf.  FIGS. 5 a  to 5 c   ) thus takes place counter to the spring force of the spring  35 . 
     When the loading lever handle  15  is pivoted, the inner end  20  of the loading lever handle  15  rotates about the bearing axle  31 . In doing so, the wedge shaped end  131  of the closing aid pin  125  moves in relation to the locking latch  34 , such that when the rounded inner end  20  of the loading lever handle  15  strikes the wedge surface  131 , the closing aid pin  125  is slid in the loading lever retainer  17  toward the gas piston rod  111 . As can be seen in  FIGS. 5 b  and 5 c   , the closing aid pin  125  protrudes from its bore hole  55  in the loading lever retainer  17  toward the gas piston rod  111 , but is not yet engaged in one of the recesses  127  formed in both sides of the gas piston rod  111 . 
     The loading lever handle  15  is in its closing aid position in  FIGS. 6 a    o  6   c . In this position, the loading lever handle  15  is pivoted approximately 90 degrees toward the rear, and is also slid manually into the loading lever retainer  17 . The closing aid pin  125  is inserted therein from the inner end  20  of the loading lever handle  15 , counter to the force of the closing aid pin spring  137 , such that the closing aid pin  125  engages with its end facing the gas piston rod  111  in one of the two recesses  127  in the gas piston rod  111 . 
     In this secured closing aid position, the loading lever handle  15  and thus the chambering device  1  can be moved toward the muzzle of the firearm, wherein, because the closing aid pin  125  is secured in the recess  127 , the entire loading lever  13  is secured to the gas piston rod  111 . Because the gas piston rod  111  is engaged with the breechblock carrier  119 , as described above, the gas piston rod  111 , the loading lever  13 , and the breechblock carrier  119  can be moved forward, in order to bring the breechblock carrier  119  forward, from a not fully closed position to its closed position (cf.  FIGS. 16 a  to 17 b   ), for example, wherein the breechblock head  172  guides a cartridge fully into the chamber  155 , and locks it in place there. In the closing aid position, a cartridge, for example, can thus be guided into position manually, and thus quietly. The latched loading lever  13  can also be used as a closing aid for this. 
       FIG. 6 a    shows the position in which the breechblock head  172  is locked in the chamber  155 . The rubber buffer  106  bears here on the fixed stop  109  in the receiver  3 , and the loading lever retainer  17  bears with a stop surface  121  on the front surface of the breechblock carrier  119 . 
     While chambering rounds, the loading lever  13 / 13 ′ can be moved back to its actuation position as well as its closing aid position. In practice, the closing aid pin  125  is not locked in place for chambering rounds. When it is locked in place, however, the loading lever handle  15  of the loading lever  13 / 13 ′ is automatically pivoted to its starting position when the breechblock carrier and the loading lever housing  59 ′ such that a part of the firearm does not protrude or extend outward unintentionally, possibly injuring the shooter while firing the firearm. 
     The loading lever handle  15  and the closing aid pin  125  are automatically disengaged from the closing aid position when the loading lever handle  15  is released from its rearmost position (cf.  FIGS. 18 and 18   a  to  19   b ), and the closing spring  161  of the breechblock carrier  119  and thus the loading lever housing  59 ′ and the loading lever  13  are driven forward, and strike the chambering device on the receiver. The actuation position is also referred to as the chambering position. 
       FIG. 7  shows an enlarged detail illustration of the loading lever handle  15  and the loading lever retainer  17 , as well as the loading lever  13 ′ in the closing aid position. The disassembly slider  43  is slid entirely into the loading lever retainer  17 , thus securing the locking pin  51 . When the loading lever handle is slid in, the closing aid pin  125  is pushed the length of the oblong hole  33 , until striking the loading lever axle  31  at the second end of the oblong hole  33 . 
       FIG. 8  shows a longitudinal section cut through the view shown in  FIG. 7 . The loading lever  13 ′ is in its closing aid position, in which the closing aid pin  125  engages at its end  129  with the recess  127  in the gas piston rod  111 . At this point, the oblong hole  33  bears on the loading lever axle  31  at its end toward the loading lever handle  15 . The wedge surface  133  on the opposite end of the closing aid pin  125  is disengaged from the latching recess  34  on the inner end  20  of the loading lever handle  15 . In addition, a blocking and locking pin  141  is shown, which limits the movement of the closing aid pin  125  inside the loading lever retainer  17 , and prevents a skewing of the closing aid pin  125 . The inner end  20  of the loading lever handle  15  comprises a locking surface  139 , via which the inner end  20  of the loading lever handle  15  is braced against the inner housing of the loading lever  13 / 13 ′ when the loading lever handle  15  is in the closing aid position. The locking surface is large enough to counteract any wear caused by the movement of the loading lever. The locking surface  139  prevents a folding down of the loading lever handle  15  toward the front. 
       FIG. 9  shows an enlarged detail illustration of the front surface of the loading lever housing  59 ′ shown in  FIGS. 4 a  to 6 c   , with its front loading lever housing guide  73 . The rubber buffer  106  is supported in the buffer bearing  104  via the cross pin (not shown) that can be inserted in the cross pin bearing  105 . The buffer  106  bears on the fixed stop  109  when the chambering device is in the standby position inside the receiver  3 . The fixed stop  109  limits the forward movement of the loading lever housing  59 ′ toward the muzzle, beyond the standby position. 
       FIG. 10  shows a perspective view of the loading lever housing  59 ′ with the loading lever  13 ′ placed therein. The loading lever handle  15  is folded in, where it is latched to the receiver (not shown) with its loading lever latch  23 . The loading lever  13 ′ is placed in the bearing  99  of the loading lever housing  59 ′, and the locking pin  51  is held in place, as explained above, such that the disassembly slider  43  is located entirely in the loading lever retainer  17 . The loading lever  13  is then in its standby position. 
       FIG. 11  shows a perspective view of the loading lever housing  59 ′ with the loading lever  13 ′ removed. The disassembly slider  43  is in its locked position, in which it is inserted into the loading lever retainer  17  and bears thereon. In order to remove it via the disassembly slider  43 , as described above, the locking pin  51  is removed from the bore hole  53  counter to the spring force of the locking pin spring or the disassembly slider spring  45  (cf.  FIGS. 12 and 13 ), such that it is disengaged from the locking pin hole  87  in the bearing at its side facing the gas piston rod  111 , and ends up basically flush with the end  50  of the loading lever retainer. In the position shown in  FIG. 11 , the circumferential retention ridge  57  can be inserted into the complementary guide slot  103  on either the left or right side of the loading lever housing  59 ′. When the loading lever retainer  17  is fully inserted, the locking pin  51  is latched in place in the bearing through the force of the disassembly slider spring  45 , and more precisely in the complementary bore hole  87  provided there. 
     With the loading lever housing  59  of the first embodiment, the locking pin  51  is automatically pushed in, counter to the force of the spring  137 , when the loading lever housing  59  is pushed into the bearing  83 , and is likewise automatically retained in the bore hole  87  when the loading lever housing  59  strikes the rearmost part of the bearing  83 . The disassembly slider  43  needs only to be actuated when the loading lever housing  59  is to be removed. 
     With the loading lever housing  59 ′ in the second embodiment, the locking pin  51  has a bevel  52  at its latching end (cf.  FIG. 8 ). The disassembly slider  43  does not need to be pulled out to insert the loading lever retainer  17  into the bearing  99 . The loading lever housing needs only be pushed into the bearing  99 , wherein the locking pin  51  is pushed by the bevel  52  counter to the force of the disassembly slider spring  45 , and is automatically latched in place in the bore hole  87  as soon as the loading lever housing  59 ′ strikes the front part of the bearing. The disassembly slider  43  need only be actuated in order to remove the loading lever housing  59 ′. 
       FIGS. 12 a  to 12 c    show the loading lever  13 ′ fully inserted in the left-hand bearing  99 , which is then retained in the bearing  99  at a stop, but is not locked in place there. The disassembly slider  43  still extends out of the loading lever retainer  17 . The locking pin  51  comprises a bevel  52  at its front end, which faces the bearing  99  (cf.  FIG. 8 ). This beveled surface  52  passes over the contours of the rear guide slot  103  when the loading lever retainer  17  is placed in the bearing  99 . When the loading lever retainer  17  is inserted, the bevel  52 , and thus the locking pin  51 , are pushed toward the locking pin spring, thus compressing it. The locking pin  51  is first forced into the bore hole  81 , latching the loading lever  13  in place, when the locking pin  51  is flush with the bore hole  87  in the bearing  99 , in its hinging position. 
     Furthermore, the receiver bearing  36  for the loading lever handle leg of the leg spring that pivots the loading lever handle  15  into the folded-in starting or standby position is shown in the cutting plane I-I depicted in  FIG. 12 b   . The leg spring  35  itself is not shown therein. The cross section in  FIG. 12 c   , cut along the cutting plane II-II in  FIG. 12 b    shows the bearing  99  form on both sides for receiving the loading lever  13 ′. Furthermore, the cross pin  123  forming a retaining pin for the disassembly slider  43  is depicted. 
       FIG. 13  shows a further perspective illustration of the loading lever housing  59 ′ without the gas piston rod  111  and with the loading lever  13 ′ placed or slid therein, but not locked in place. The loading lever retainer  17  is inserted fully into the left-hand bearing guide slot  103  of the bearing  99 . The disassembly slider  43  protrudes from the loading lever retainer  17  at its outer end, such that the loading lever retainer  17  is not locked in place in the bearing guide slot  103 . The right-hand bearing ridge of the bearing  99  is unoccupied. 
     In the side view in  FIG. 14 a    and the longitudinal section cut along the cutting plane I-I in  FIG. 14 a   , as well as in the cross section in  FIG. 14 c    cut along the cutting plane II-II in  FIG. 14 b   , the loading lever  13 ′ is shown fully inserted into the bearing  99 , and locked in place there. The disassembly slider  43  is entirely inside the loading lever retainer  17 , such that the locking pin  51  enters the bore hole  87  in the loading lever housing  59 ′ at its end toward the loading lever housing  59 ′, and is latched in place there. The closing aid pin  125  is not latched in place, and is located outside the bore hole  89 . The closing aid pin  107  is braced against its spring bearing  138  in the loading lever retainer  17 , specifically in the bore hole  55 , and forces the closing aid pin  125  against the inner end  20  of the loading lever handle  15 . At this point, the wedge surface  133  on the closing aid pin  125  is located inside the locking latch  34 , and thus locks the loading lever  13  in a force fitting manner in its folded-in standby position. 
       FIG. 15  shows a comparable perspective to the illustration in  FIG. 13 , in which the disassembly slider  43  is in its locked position, in which the locking pin  51  engages with the bore hole  87  in the bearing  99  on the loading lever housing  59 ′. 
       FIGS. 16 a , 16 b  and 18 a  and 18 b    show components of an automatic firearm, as explained in the introduction, with the chambering device  1  placed therein.  FIGS. 17 a , 17 b    and  FIGS. 19 a  and 19 b    show the depictions in  FIGS. 16 a , 16 b  and 18 a , 18 b   , without the receiver  3 . 
     The barrel  143  comprises a flash suppressor  145  at its front end in each case. A gas discharge  147  is attached to the upper surface of the barrel in the known manner, and supported on the barrel  143  via a locking pin or retaining pin  149 . The barrel  143  is reinforced in a section  151  in the region of the gas discharge  147 . The barrel transitions toward the back into a chamber  155 , into which a cartridge (not shown) is inserted in the known manner via the breechblock head  172 . 
     Two receivers  11  for attaching a grip stock and a hand guard (not shown) are shown in each case on the undersurface of the upper part of the receiver  3 . 
     There is a further receiver  153  at the rear end of the upper part of the receiver  3  for a rear locking pin for a grip stock and breech ring (not shown). The known Picatinny rail  5  is located on the upper surface of the upper part of the receiver  3 . The side walls of the upper part of the receiver  3  have guide slots  7  for an ambidextrous attachment of the loading lever  13  with its loading lever handle  15  and loading lever receiver  17 . The loading lever handle  15  is secured with its loading lever latch to a counter-retaining element  24  on the receiver in its standby position shown in  FIGS. 16 a    to  17   b.    
     The chambering device  1  (and thus the loading lever  13 ) is in its foremost position when in the standby position, in which the buffer  16  on the loading lever housing  59 ′ bears on the fixed stop  109  in the inner surface of the upper part of the receiver  3 . 
       FIGS. 17 a  and 17 b    (without the upper part of the receiver  3 ) illustrates how the breechblock carrier  119  bears with its upper front end on the loading lever retainer  17 , specifically its bearing surface  121  (cf.  FIGS. 2 b  and 4 c  to 6 c   ). The undersurface of the breechblock carrier  119  bears on the chamber  155 , wherein the breechblock head  172  is in its locked position inside the chamber  155 . There is a feed regulator pin  157  located inside a feed regulator configuration  158 . 
     A firing pin safety  159  is located at the rear lower end of the breechblock carrier  119 . The upper rear end of the breechblock carrier  119  borders on a closing spring  161 , which encompasses a closing spring guide tube  163 . 
     Upon firing a round, the breechblock carrier  119  is pushed backward by propellant diverted by the gas discharge  147  acting on the front end of the gas piston rod  111 , toward the stock, and decoupled from the loading lever  13  and the loading lever housing  59 ,  59 ′. Because the loading lever housing  59 ,  59 ′ is secured at its starting position on the receiver  3 , it does not move therewith. In the rearmost position of the breechblock carrier  119  (cf.  FIGS. 18 a  to 19 b   ), the closing spring  161  is fully compressed, and the breechblock carrier  119  receives the closing spring guide tube  163 , such that the closing spring  161  then forces the breechblock carrier  119  forward. 
     At the rear end of the closing spring guide tube  163  and the closing spring  161  there is a breech ring  165  in the known manner, which has a retaining pin  167  for coupling to the upper surface of the receiver  3 . A known removal handle  169  and a receiver  171  for a housing retaining pin are located on the undersurface of the breech ring  165 . 
     In returning to  FIG. 16 a   , the loading lever  13 ′ is located ca. 6 cm further back in the receiver than in the first embodiment. This is due to the different locations of the bearings  99  and  83  (cf.  FIGS. 3 a  and 3 b   ) on the slides  59  and  59 ′, respectively. Accordingly, the counter-retaining element  24  is also at different locations on the two embodiments. 
     The chambering of rounds basically simulates a firing of the firearm, but is carried out manually. For this, the loading lever handle  15  is pivoted about 90 degrees to the back (cf.  FIGS. 18 a  to 19 a   ). The shooter then grips the loading lever handle  15 , depending on whether it is located on the left or right side of the firearm, on the left or right side of the firearm, wherein it is unlatched from the counter-retaining element  24  on the receiver  3 . 
     When the loading lever handle  15  is pulled back, it pushes against the back surface of the loading lever housing  59  in the first embodiment, and against the bearing surface  121  on the front surface of the breechblock carrier  119  in the second embodiment. In this manner, it is possible to manually guide the breechblock carrier  119  together with the loading lever handle  15  and the loading lever retainer, as well as the loading lever housing  59 ′ toward the back inside the guide slot  7 , counter to the force of the closing spring  161 . The breechblock head  172  passes over a magazine (not shown) that is inserted into the automatic firearm in doing so. 
       FIGS. 18 a  to 19 b    show the breechblock carrier  119  and the loading lever housing  59 ′ in their rearmost position, in which the breechblock head  172  is also shown in  FIG. 19 a   . The feed regulator pin  157  is inside the feed regulator configuration  158  in its foremost position, in which the breechblock head  172  can be unlocked from the chamber  155  and removed therefrom. The locking and unlocking in the feed regulator configuration  158  takes place in the known manner. The closing spring guide tube  161  is received entirely inside the breechblock carrier  119 . The front end  115  of the gas piston rod  11  is fully decoupled from the gas discharge  147 . 
     If the chambering position or actuation position of the loading lever  13 ,  13 ′ shown in  FIGS. 18 to 19   b  is manually released, or latched in position toward the front, for a quiet closing thereof, the breechblock head  172  grips, at a front lower end, a cartridge in the magazine, not shown here, and removes it from the magazine, placing it in the chamber  155 , wherein the breechblock head  172  is guided in the known manner along the feed regulator configuration  158 , and is thus locked inside the chamber  155 . The buffer  106  also strikes the fixed stop  109  inside the upper part of the receiver, wherein the closing aid pin  125  is unlatched, such that the loading lever handle  15  is again pivoted forward to its starting or standby position, and is locked in place on the upper part of the receiver  3 , in the counter-retaining element formed therein. The firearm is then loaded and ready to fire. 
       FIGS. 20 a  to 20 c    show further perspective illustrations of the loading lever housing  59  and the loading lever  13  of the first embodiment (cf.  FIGS. 2 a  and 3 a   ). The loading lever retainer  17  is placed in the bearing  83  of the loading lever housing  59  in  FIG. 20 a   . The retaining lugs  49  face the recesses between the retaining lugs  85  in the bearing  83  of the loading lever housing  59  at this point. The retaining lugs  85  on the bearing  83  collectively form a bearing configuration. In this position, the loading lever  13  can be placed in the bearing  83 , or removed therefrom. The disassembly slider  43  is in its locked position in  FIG. 20 a   , and is thus fully inserted in the loading lever retainer  17 . The locking pin  51  (cf.  FIG. 2 a   ) protrudes from the undersurface of the loading lever retainer  17 . 
     The disassembly slider  43  is pushed out of the loading lever retainer  17  in  FIG. 20 b   , such that the locking pin  51  is inserted into the undersurface of the loading lever retainer  17 . In this position, the undersurface of the loading lever retainer  17  bears entirely on the upper surface of the bearing  83 . 
     The locking of the loading lever retainer  17  is illustrated in  FIG. 20 c   . In comparison to  FIG. 20 b   , the loading lever retainer  17  is pushed back, such that it bears on the stop on the outer end of the bearing configuration. In this position, the locking pin is above the associated complementary bore hole  87  inside the bearing  82  of the loading lever housing  59  (cf.  FIG. 2 a   ), and can enter this hole, wherein the disassembly slider  43  is again flush with the outer surface  37  of the loading lever retainer  17 . When the loading lever retainer  17  is slid back inside the loading lever housing  59 , the retaining lugs  49  are displaced in relation to the bearing configuration and the retaining lugs  85 , and latch in place there. The loading lever  13  is thus secured in the bearing  82 . 
       FIG. 21  shows a side view of the receiver of the assault rifle HK433 by the same applicant, from a parallel application, DE 10 2017 002 242.9.  FIGS. 22 a  and 22 b    each show cross sections cut through the receiver in  FIG. 21  along the cutting planes A-A and E-E. The details of this receiver are described in DE 10 2017 002 242.9. 
     The breechblock guide rails  175  are formed in the receiver  3  on both sides in the middle, and extend to engage with guide grooves on both sides of the breechblock carrier guide  120  on the upper surface of the breechblock carrier  119 , and with the front and rear loading lever housing guides  73  and  75 , at a right angle toward the inside. The breechblock guide rails  175  are formed as an integral part of the monolithic receiver over the entire length of the receiver, during the extrusion or molding of the receiver  3 . The breechblock guide rails  175  form a rail guide for the breechblock carrier  119  as well as for the loading lever housing, or slide  59 ,  59 ′. 
     Because of this loading lever housing guidance, the loading lever can be located relatively far back in the firearm, thus improving the ergonomic manipulation of the chambering device  1 . 
     Further embodiments of the invention can be derived by the person skilled in the art from the following claims and the attached drawings. 
     Example methods, apparatus, systems, and articles of manufacture to Device for Chambering of Rounds in an Automatic Firearm, and an Automatic Firearm Equipped with the Same are disclosed herein. Further examples and combinations thereof include the following: 
     Example 1 includes a device for chambering rounds in an automatic firearm having a breech that can move longitudinally in a receiver, the device comprising a chambering lever including a charging handle coupled to a handle retainer, and a slide having a left side and a right side, the slide movable longitudinally in the receiver, wherein the charging handle is pivotable from a standby position to an actuation position relative to the handle retainer, and wherein the handle retainer can be mounted to the left side or the right side the slide and can be removed therefrom without tools. 
     Example 2 includes the device according to example 1, wherein the charging handle is pretensioned on the handle retainer when in the standby position. 
     Example 3 includes the device according to example 1 or 2, wherein when chambering a round in the automatic firearm, only one bearing surface of the handle retainer or one end surface of the slide is releasably connected to the breech. 
     Example 4 includes the device according to any of examples 1-3, wherein when firing the automatic firearm, the device is entirely separated from the breech. 
     Example 5 includes the device according to any of examples 1-4, wherein at the bolt includes a latching element that is configured to latch onto or with a counter-latch on the receiver, such that the bolt can be secured to the counter-latch. 
     Example 6 includes the device according to any of examples 1-5, wherein the slide includes at least one longitudinal hole to receive a gas piston rod. 
     Example 7 includes the device according to any of examples 1-6, wherein the device can be secured to the gas piston rod for loading a cartridge into a chamber. 
     Example 8 includes the device according to example 7, wherein the device has an engagement element that engages with at least one hole in the gas piston rod, wherein the engagement element can be moved between an engaged position and a released position. 
     Example 9 includes the device according to example 8, wherein the engagement element is pretensioned in its released position via an elastic element. 
     Example 10 includes the device according to example 8 or 9, wherein the charging handle can only be slid and/or pivoted into its engaged position when the handle retainer is in the actuation position. 
     Example 11 includes the device according to any of examples 1-10, wherein the charging handle is hinged at an end facing the slide such that the charging handle can pivot about a bearing axle in the handle retainer between the standby position and the actuation position, and the bold handle includes an elongated hole that encompasses the bearing axle and extends in a direction substantially transverse to the longitudinal direction of the device when the charging handle is in the actuation position. 
     Example 12 includes the device according to example 11, wherein the charging handle is pivotable about an end of the elongated hole facing the slide when pivoted between the standby position and the actuation position, and can be displaced when the charging handle is brought into the engaged position inside the elongated hole such that the bearing axle bears on an end of the elongated hole lying opposite the slide. 
     Example 13 includes the device according to example 12, wherein the charging handle includes a locking latch at an end facing the slide that engages with the engagement element when in the standby position, wherein the locking latch is disengaged from the engagement element when the charging handle is pivoted into the actuation position, and pivots and/or slides the engagement element toward the slide. 
     Example 14 includes the device according to any of examples 1-13, wherein the slide has a receiver bearing for receiving and coupling the handle retainer. 
     Example 15 includes the device according to any of examples 1-14, wherein the handle retainer can be locked in place on the slide in or on the receiver bearing. 
     Example 16 includes the device according to any of examples 1-15, wherein the handle retainer has a spring-loaded element, the actuation of which to a disassembly position unlatches the handle retainer from the slide. 
     Example 17 includes the device according to any of examples 1-16, wherein the slide comprises a guide section on each side thereof, in which complementary guide rails engage and are guided in the receiver. 
     Example 18 includes the device according to any of examples 1-17, wherein the slide includes a stop element with a buffer element that strikes a fixed stop in the receiver. 
     Example 19 includes an automatic firearm including a bolt action for chambering rounds and a breech that can move longitudinally in a receiver, the automatic firearm comprising a chambering lever including a charging handle coupled to a bolt retainer, and a slide having a left side and a right side, the slide movable longitudinally in the receiver, wherein the charging handle is pivotable from a standby position to an actuation position relative to the bolt retainer, and wherein the handle retainer can be mounted to the left side or the right side the slide and can be removed therefrom without tools. 
     Example 20 includes the automatic firearm according to example 19, wherein the receiver includes guide rails extending on both longitudinal sides of the receiver for guiding the breechblock carrier via guide sections on both sides of the breechblock carrier, and for guiding the slide via its guide sections formed on each side thereof. 
     Example 21 includes the automatic firearm according to example 19 or 20, wherein the receiver includes a hole on a side of the receiver, through which the handle retainer coupled to the charging handle can be placed in or removed from the slide for assembly or disassembly, respectively, and in which it is guided during the chambering procedure. 
     Example 22 includes the automatic firearm according to any of examples 19-21, wherein the receiver includes a counter-latch on the receiver, which can be secured in place on the bolt lever during the movement of the breech. 
     LIST OF REFERENCE SYMBOLS 
     
         
         
           
               1  chambering device 
               3  receiver 
               5  Picatinny rail 
               6  mounting screw for a fixed stop  109  in the receiver 
               7  guide slot 
               9  undersurface 
               11  receivers for the handle and hand guard attachments 
               13 ,  13 ′ loading lever 
               15  loading lever handle 
               17  loading lever retainer 
               19  outer end of the loading lever handle 
               20  inner end of the loading lever handle 
               21  liner 
               22  inner loading lever handle 
               23  retaining lug/loading lever latch 
               24  counter-retaining element on receiver 
               25  outer slanted surface 
               27  front slanted surface 
               29  rounded undersurface 
               31  loading lever axle 
               33  oblong hole in inner end of the loading lever handle  20   
               34  locking latch for the recoil spring in the standby position 
               35  spring 
               36  receiver bearing for the loading lever handle leg of the spring  35   
               37  outer surface of the loading lever retainer  17   
               39  slot in the outer surface 
               40  stop 
               41  surface 
               43  disassembly slider 
               44  profile structure on  43   
               45  disassembly slider spring 
               46  guide surface 
               47  circumferential recess in the upper surface and lateral surfaces 
               49  retaining lug 
               50  end/undersurface of the loading lever retainer 
               51  locking pin for the disassembly slider 
               52  bevel on locking pin 
               53  bore hole for the locking pin in the disassembly slider 
               55  bore hole for the closing pin for securing it to the gas piston 
               57  retention ridge (continuous) 
               59 ,  59 ′ loading lever housing/loading lever housing 
               61  upper surface 
               63  front ridge 
               67  buffered stop 
               69  rear ridge 
               71  front recess 
               73  front loading lever housing guide 
               75  rear loading lever housing guide 
               77  upper guide section 
               79  lower guide section 
               83  bearing for loading lever retainer 
               85  retaining lugs in bearing 
               87  bore hole for locking pin 
               89  through hole for closing pin 
               91  slanted lateral surfaces 
               93  recesses in loading lever housing (weight reducing) 
               95  gas piston rode receiver 
               97  semicircular undersurface 
               98  section 
               99  bearing for loading lever retainer 
               101  rear end of loading lever housing  59 ′ 
               103  parallel guide slot 
               104  buffer bearing of the buffered stop 
               105  cross pin bearing for rubber buffer 
               106  rubber buffer 
               107  recessed region between loading lever housing guides  73 ′ and  75 ′ 
               109  fixed stop in receiver 
               111  gas piston rod 
               113  rear end of gas piston rod 
               115  front end of gas piston rod 
               117  cross pin for securing  113   
               119  breechblock carrier 
               120  loading lever housing guide on breechblock carrier 
               121  bearing surface of loading lever retainer  17  on breechblock carrier 
               123  bearing pin as a spring bearing for closing pin and disassembly slider 
               124  bearing 
               125  closing pin 
               127  closing pin recesses on both sides of gas piston rod 
               129  inner end of locking pin 
               131  wedge-shaped end of closing pin 
               133  wedge surface/latch on locking pin for engagement with  34   
               137  spring for closing pin 
               138  spring bearing for  137   
               139  locking surface for loading lever 
               141  stop and locking pin for closing pin 
               143  barrel 
               145  flash suppressor 
               147  gas discharge 
               149  limit pin/retaining pin for  147   
               151  reinforced barrel section 
               153  receiver for rear limit pin for handle and breech ring 
               155  cartridge chamber 
               157  feed regulator pin 
               158  feed regulator configuration 
               159  firing pin safety 
               161  closing spring 
               163  closing spring guide tube 
               165  breech ring 
               167  retaining pin for upper loading lever housing surface 
               169  removal handle on  165   
               171  receiver for the receiver retaining pin 
               172  breechblock head 
               175  guide rail