Abstract:
A collapsible buttstock with automatic deployment has a housing with an opening providing clearance for a buffer tube. Rods slidably couple through respective openings in the housing; the rods each having a hollow cavity accommodating biasing structure for exerting a biasing force against a respective attachment member. A locking element has locking blocks, each engaging a respective one of plural notches on the rods, for locking the rods to an operator support buttstock element, each of the locking blocks comprising a tapered surface. A release trigger with a contoured step engages the tapered surfaces of the locking blocks. When the release trigger is moved, the contoured step engages the tapered surfaces to push locking blocks away from engagement with the notches on the rods, thus allowing the biasing member in each rod to push the respective rod and the operator support buttstock element away from the housing.

Description:
[0001]    This application is a non-provisional of U.S. Patent Appln. No. 62/195,114, filed Jul. 21, 2015 the contents of which are incorporated herein by reference. 
     
    
     FIELD OF THE INVENTION 
       [0002]    The invention is directed to a collapsible buttstock attached to a firearm having an energy storage device, which, upon release of the stored energy, automatically and rapidly moves the butt stock from a locked collapsed position to a fully or partially extended position—thus enabling the firearm operator to position the buttstock in the proper shoulder location and allowing the operator to better control the firearm and make accurate shots. 
       BACKGROUND OF THE INVENTION 
       [0003]    Members of the armed forces and law enforcement worldwide utilize several types of firearms, which generally fall into three main categories, hand guns ( FIG. 1 d   ), submachine guns ( FIG. 1 c   ) and rifles ( FIG. 1 a   ). Carbines may also be considered under the rifle category and the terms carbine and rifle may be used interchangeably hereinafter to refer to firearms in the rifle category. Selection of the type of weapon to be used depends mainly on the task at hand. Amongst the aforementioned firearms categories, the rifle offers the best accuracy and the longest effective range exceeding 600 yards, which also depends on the type of ammunition being used. The most common are the 5.56 mm and 7.62 mm cartridges. The submachine gun comes in second place after the rifle in accuracy and effective range. This category of firearms utilizes the same ammunition utilized in a handgun, cartridges such as 9 mm, .40S&amp;W and 45ACP. The effective range for a submachine gun is about 150 yards, whereas, that of a handgun is about 25 yards. Although the rifle offers the longest effective range, it is also the largest and heaviest of the aforementioned categories. Space, and to a lesser extent weight, limitations may constrain the firearm selection to one with shorter effective range and less accuracy, such as a submachine gun or even a handgun when space requirements are exceedingly restricted. This immediately puts the firearm operator at a disadvantage when facing an enemy with superior firearm capability. 
         [0004]    The rifle and submachine gun both provide a three point contact while taking aim and firing the firearm. Both hands hold the firearm and the buttstock is held against the shoulder, thus providing three points of contact for an improved firearm control over the handgun, which, at most, provides only two points of contact (two hands). 
         [0005]    The buttstock on a rifle ( FIG. 1 a   ) serves two general functions: first, it provides a third point of contact allowing proper positioning of the firearm, the two hands holding the firearm providing the first and second points of contact. The buttstock allows the firearm operator to position the carbine in a stable position supported by the point of contact between the buttstock and the operator&#39;s shoulder. That is, when firing, the buttstock properly sets on the user&#39;s shoulder when the firearm is held orthogonally to the user&#39;s body, with the bottom of the firearm pointing straight down toward the ground, this position is called proper shoulder location. Second function: the buttstock is the conduit to channel recoil energy into the operator&#39;s body. Proper firearm position (shoulder/buttstock contact) is also the best point of contact to dissipate recoil energy into the operator&#39;s body when a round is discharged. The buttstock transmits recoil energy generated by the discharged round into the point of contact (the shoulder), dissipation of recoil energy through the buttstock into the operator shoulder allows the operator to better control the firearm and keep the firearm on target for a follow up shot. 
         [0006]    A buttstock is essential for the accurate firing and control of the firearm. However, the conventional buttstock ( FIG. 1 a   ) presents a deterrent to meeting limited weight and space requirements. Hence, it has been suggested that a collapsible buttstock be used with the rifle, for example, by GOMEZ U.S. Pat. No. 8,943,947 B2, by CROSE U.S. Pat. No. 8,061,072 B1, by WELDEL U.S. Pat. No. 6,564,492 B2, and by Sampson U.S. Pat. No. 2,424,194. 
         [0007]    Collapsible buttstocks ( FIGS. 1 e    &amp;  1   f ) provide a practical solution to the weight and space restrictions that a conventional buttstock fails to address. However, when the need arises to deploy a collapsible buttstock, there is limited time to react and get the gun in a fire ready position. The firearm operator might be in a stressful situation or even taking fire from an enemy. Deploying the collapsible buttstock under such circumstances becomes an ordeal. Even if the firearm operator is able to deploy the collapsible buttstock, valuable time will have been spent extending the collapsible buttstock, time in which the operator is not firing and possibly taking fire. 
         [0008]    Therefore, there is a need to develop a collapsible buttstock that can be deployed quickly and with the least amount of effort. 
       SUMMARY OF THE INVENTION 
       [0009]    The present disclosure is directed to a collapsible buttstock for a firearm. The buttstock can be collapsed and locked in the collapsed position. The buttstock can be expanded automatically utilizing the release of stored energy within an energy storage device, the released energy displacing the buttstock away from the firearm. The buttstock can further be locked in multiple expanded positions, as disclosed herein below. According to a first aspect, a method of manufacturing a collapsible buttstock with automatic deployment (CBAD) comprises: attaching a first housing to a firearm, the housing is affixed to the firearm and provides clearance for a buffer tube, the buffer tube goes through an opening that traverses the housing longitudinally, and attaches to the firearm, doing so the buffer tube applies pressure to the back side of the housing, thus, securing the housing to the firearm. The housing attached to the firearm supports two rods that slide through two openings that traverse the housing longitudinally, one end of the rods can slide towards and away from the firearm. A second housing (buttstock shoulder support) is affixed to the other ends of the rods. The two rods can move with respect to the firearm, while being guided by the openings in the first housing, hence, the buttstock shoulder support (BSS) can move with respect to the firearm, the rods are hollow to allow placement of helical spring within them, the rods also have notches positioned on the outside diameter of the rods and along the length of the rods, these notches allow locking the rods in different positions with respect to the firearm. 
         [0010]    According to a second aspect, the aforementioned first housing encompasses a mechanism that locks the position of the rods, hence, the BSS in multiple positions with respect to the firearm. 
         [0011]    According to a third aspect, two helical springs are disposed between the BSS and the first housing; the two helical springs are located inside the two hollow rods which attach the shoulder BSS to the first housing, the helical springs are configured in such a way that when the BSS is in the collapsed position, the helical springs are fully or partially compressed. The two rods, hence, the BSS is locked in a collapsed position by the locking mechanism within the first housing. Upon the release of the locked rods, the potential energy stored within the helical springs will be released and will push the BSS away from the firearm body. The locking mechanism may be actuated to lock the rods in one of multiple expanded positions with respect to the firearm. 
         [0012]    In certain aspects, the first housing comprises three openings that longitudinally traverse the housing, one for the buffer tube and two for the guide rods. The first housing also comprises an alignment pin protruding from the housing front side facing the firearm, the function of the alignment pin is to maintain the orientation of the housing and the firearm and avoid inadvertent rotation of the housing. 
         [0013]    In certain aspects, the first housing comprises a locking mechanism comprised of two locking blocks and a guide block that contacts both blocks, the blocks move against each other, their movement is constrained by channels within the first housing and their tapered surfaces touching each other. Furthermore, two helical springs within the locking mechanism bias the locking mechanism in a normally locked position (unless activated by the operator, the locking mechanism maintains the rods” position in the selected position). 
         [0014]    In certain aspects, the CBAD device further comprises two helical springs, wherein the helical springs are contained within the hollow rods and each helical spring is restricted at both ends, one end is restricted by a pin secured to the first housing, another pin is secured to the BSS and restricts the other end of the helical spring. 
         [0015]    In certain aspects, the CBAD device comprises a BSS, the BSS is secured to the guide rods, the BSS has an opening at one side, the opening provides clearance for the buffer tube when the BSS is in the fully collapsed position 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0016]    The features of the present invention will best be understood from a detailed description of the invention and a preferred embodiment thereof selected for the purposes of illustration and shown in the accompanying drawings in which: 
           [0017]      FIG. 1 a    illustrates a side view of a conventional rifle (an AR15 or M16 style rifle) with a conventional fixed buttstock. 
           [0018]      FIG. 1 b    illustrates a side view of a conventional rifle with a collapsible buttstock 
           [0019]      FIG. 1 c    illustrates a side view of a conventional submachine gun with a collapsible buttstock. 
           [0020]      FIG. 1 d    illustrates a side view of a conventional semi-automatic hand gun. 
           [0021]      FIG. 1 e    illustrates a side view of a conventional collapsible buttstock for a submachine gun type firearm. 
           [0022]      FIG. 1 f    illustrates a side view of another style of conventional collapsible buttstock for a rifle type firearm. 
           [0023]      FIG. 2 a    illustrates a rear perspective view of a firearm with a collapsible buttstock with automatic deployment (CBAD) and a buttstock shoulder support (BSS). 
           [0024]      FIG. 2 b    illustrates a side perspective view of the firearm with a CBAD of  FIG. 2   a.    
           [0025]      FIG. 2 c    illustrates a side view of the firearm with CBAD of  FIG. 2   a.    
           [0026]      FIG. 2 d    illustrates a back view of the firearm with CBAD of  FIG. 2   a.    
           [0027]      FIG. 2 e    illustrates a front view of the firearm with CBAD of  FIG. 2   a.    
           [0028]      FIG. 3 a    illustrates rear perspective view of an assembly of a CBAD module. 
           [0029]      FIG. 3 b    illustrates a rear perspective view of the two guide rods used in the CBAD module. 
           [0030]      FIG. 3 c    illustrates a rear perspective view of the housing for a CBAD module. 
           [0031]      FIG. 3 d    illustrates a side perspective view of the housing for the CBAD module. 
           [0032]      FIG. 3 e    illustrates a top view of the housing for the CBAD module of  FIG. 3   a.    
           [0033]      FIG. 3 f    illustrates a side view of the housing for the CBAD module of  FIG. 3   a.    
           [0034]      FIG. 3 g    illustrates a rear view of the housing for the CBAD module of  FIG. 3   a.    
           [0035]      FIG. 3 h    illustrates a front view of the housing for the CBAD module of  FIG. 3   a.    
           [0036]      FIG. 3 i    illustrates a bottom view of the housing for the CBAD module of  FIG. 3   a.    
           [0037]      FIG. 3 j    illustrates a front perspective view of the buffer tubes used with the CBAD module. 
           [0038]      FIG. 3 k    illustrates a rear perspective view of the buffer tubes of  FIG. 3   j.    
           [0039]      FIG. 3 l    illustrates a front perspective view of the BSS used with the CBAD module. 
           [0040]      FIG. 3 m    illustrates a rear perspective view of the BSS used with the CBAD module of  FIG. 3   l.    
           [0041]      FIG. 3 n    illustrates a cross sectional top view of the CBAD module. 
           [0042]      FIG. 3 o    illustrates a rear view of the CBAD module of  FIG. 3   n.    
           [0043]      FIG. 4 a    is a cross sectional side view of a firearm with a CBAD module, the CBAD is in the fully collapsed position. 
           [0044]      FIG. 4 b    is a front view of a firearm with a CBAD module of  FIG. 4   a.    
           [0045]      FIG. 4 c    is a cross sectional side view of a firearm with a CBAD module, the CBAD is in the fully extended position. 
           [0046]      FIG. 4 d    is a front view of a firearm with a CBAD module of  FIG. 4   c.    
           [0047]      FIG. 5 a    is a top perspective view of the locking blocks for the CBAD module. 
           [0048]      FIG. 5 b    is a bottom view of the locking blocks. 
           [0049]      FIG. 5 c    is a top view of the locking blocks. 
           [0050]      FIG. 5 d    is a bottom perspective view of the release trigger used in the CBAD module. 
           [0051]      FIG. 5 e    is a rear perspective view of the release trigger of  FIG. 5   d.    
           [0052]      FIG. 5 f    is a top view of the release trigger of  FIG. 5   d.    
           [0053]      FIG. 5 g    is a front perspective view of the safety bar used in the CBAD module. 
           [0054]      FIG. 5 h    is a rear perspective view of the safety bar of  FIG. 5   g.    
           [0055]      FIG. 5 i    is a perspective view of the spring-loaded plunger used in the CBAD module. 
           [0056]      FIG. 6 a    is a top view of the CBAD module—CBAD module being in the fully collapsed position and the safety bar being in the “Safety on” position. The housing and the buffer tube are removed exposing details of the locking module. 
           [0057]      FIG. 6 b    is a detailed view of a portion of the top of the CBAD module of  FIG. 6 a   , detailing some of the exposed components of the locking system. 
           [0058]      FIG. 6 c    is a bottom view of the CBAD module—the CBAD module being in the fully collapsed position and the safety bar being in the “Safety on” position. 
           [0059]      FIG. 6 d    is a detailed view of a portion of the bottom of the CBAD module of  FIG. 6 c   , detailing the release trigger. 
           [0060]      FIG. 6 e    is a perspective view of the locking blocks, release trigger and helical spring assembled outside the CBAD with the locking blocks in the locking position. 
           [0061]      FIG. 6 f    is a top view of the locking blocks, release trigger and helical spring assembled outside the CBAD with the locking blocks in the locking position. 
           [0062]      FIG. 7 a    is a top view of the CBAD module—the CBAD module being in the fully collapsed position and the safety bar being in the “Safety off” position. The housing and the buffer tube are removed exposing details of the locking system. 
           [0063]      FIG. 7 b    is a detailed view of a portion of the top of the CBAD module of  FIG. 7 a   , detailing some of the exposed components of the locking system. 
           [0064]      FIG. 7 c    is a bottom view of the CBAD module—the CBAD module being in the fully collapsed position and the safety bar being in the “Safety off” position. 
           [0065]      FIG. 7 d    is a detailed view of a portion of the bottom of the CBAD module of  FIG. 7 c   , detailing the release trigger. 
           [0066]      FIG. 8 a    is a perspective view of the locking blocks, release trigger and helical spring assembled outside the CBAD with the locking blocks in the release position. 
           [0067]      FIG. 8 b    is a top view of the locking blocks, release trigger and helical spring assembled outside the CBAD with the locking blocks in the release position. 
           [0068]      FIG. 9 a    is a top view of the CBAD module—the CBAD module being in the fully extended position and the safety bar being in the “Safety off” position. The housing and the buffer tube are removed exposing details of the locking system. 
           [0069]      FIG. 9 b    is a detailed view of a portion of the top of the CBAD module of  FIG. 9 a   , detailing some of the exposed components of the locking system. 
           [0070]      FIG. 9 c    is a bottom view of the CBAD module, CBAD module is in the fully extended position, and the safety bar is on the “Safety off” position. 
           [0071]      FIG. 9 d    is a detailed view of a portion of the bottom of the CBAD module of  FIG. 9 c   , detailing the release trigger. 
           [0072]      FIG. 10 a    is a top view of the CBAD module—the CBAD module being in the fully extended position and the safety bar being in the “Safety on” position. The housing and the buffer tube are removed exposing details of the locking system. 
           [0073]      FIG. 10 b    is a detailed view of a portion of the top of the CBAD module of  FIG. 10 a   , detailing some of the exposed components of the locking system. 
           [0074]      FIG. 10 c    is a bottom view of the CBAD module, CBAD module is in the fully extended position, and the safety bar is on the “Safety on” position. 
           [0075]      FIG. 10 d    is a detailed view of a portion of the bottom of the CBAD module of  FIG. 10 c   , detailing the release trigger. 
           [0076]      FIG. 11 a    is a side view of a firearm with a CBAD module, the CBAD is in the fully extended position “position  3 .” 
           [0077]      FIG. 11 b    is a rear view of a firearm with a CBAD module, of  FIG. 11   a.    
           [0078]      FIG. 11 c    is a front view of a firearm with a CBAD module, of  FIG. 11   a.    
           [0079]      FIG. 11 d    is a side view of a firearm with a CBAD module, the CBAD is in the partially extended position, “position  2 .” 
           [0080]      FIG. 11 e    is a rear view of a firearm with a CBAD module of  FIG. 11   d.    
           [0081]      FIG. 11 f    is a front view of a firearm with a CBAD module of  FIG. 11   d.    
           [0082]      FIG. 11 g    is a side view of a firearm with a CBAD module, the CBAD is in the fully collapsed position, “position  1 .” 
           [0083]      FIG. 11 h    is a rear view of a firearm with a CBAD module of  FIG. 11   g.    
           [0084]      FIG. 1l   i  is a front view of a firearm with a CBAD module of  FIG. 11   g.    
           [0085]      FIG. 12 a    illustrates a rear perspective view of a firearm with a CBAD and a Recoil Mitigation Buffer Floating module (RMBF) attached to it. 
           [0086]      FIG. 12 b    illustrates a side view of the firearm with CBAD of  FIG. 12   a.    
           [0087]      FIG. 12 c    illustrates a back view of the firearm with CBAD of  FIG. 12   a.    
           [0088]      FIG. 12 d    illustrates a front view of the firearm with CBAD of  FIG. 12   a.    
           [0089]      FIG. 13 a    is a bottom perspective view of the CBAD module attached to an RMBF module. 
           [0090]      FIG. 13 b    is a rear perspective view of the CBAD module attached to an RMBF module. 
           [0091]      FIG. 14 a    is a side view of a firearm with a CBAD module with an RMBF attached to it, the CBAD is in the fully extended position, “position  3 .” 
           [0092]      FIG. 14 b    is a rear view of a firearm with a CBAD module with an RMBF attached to it of  FIG. 14   a.    
           [0093]      FIG. 14 c    is a front view of a firearm with a CBAD module with an RMBF attached to it of  FIG. 14   a.    
           [0094]      FIG. 14 d    is a side view of a firearm with a CBAD module with an RMBF attached to it, the CBAD is in the partially extended position, “position  2 .” 
           [0095]      FIG. 14 e    is a rear view of a firearm with a CBAD module with an RMBF attached to it of  FIG. 14   d.    
           [0096]      FIG. 14 f    is a front view of a firearm with a CBAD module with an RMBF attached to it of  FIG. 14   d.    
           [0097]      FIG. 14 g    is a side view of a firearm with a CBAD module with an RMBF attached to it, the CBAD is in the fully collapsed position, “position  1 .” 
           [0098]      FIG. 14 h    is a rear view of a firearm with a CBAD module with an RMBF attached to it of  FIG. 14   g.    
           [0099]      FIG. 14 i    is a front view of a firearm with a CBAD module with an RMBF attached to it of  FIG. 14   g.    
           [0100]      FIG. 15 a    is a rear perspective view of the CBAD module assembly attached to an RMBF module. 
       
    
    
     DETAILED DESCRIPTION 
       [0101]    The present disclosure is directed to a Collapsible buttstock with Automatic deployment (CBAD) device and CBAD adapter mechanism for firearms. Preferred embodiments of the present invention will be described hereinbelow with reference to the figures of the accompanying drawings. In the following description, well-known functions or constructions are not described in detail, since such descriptions would obscure the invention in unnecessary detail. 
         [0102]    For the purpose of promoting an understanding of the principles of the claimed technology and presenting its currently understood, best mode of operation, reference will be now made to the embodiments illustrated in the drawings and specific language will be used to describe the same. It will nevertheless be understood that no limitation of the scope of the claimed technology is thereby intended, with such alterations and further modifications in the illustrated device and such further applications of the principles of the claimed technology as illustrated therein being contemplated as would typically occur to one skilled in the art to which the claimed technology relates. 
         [0103]    As used herein, the word “exemplary” means “serving as an example, instance, or illustration.” The embodiments described herein are not limiting, but rather are exemplary only. It should be understood that the described embodiments are not necessarily to be construed as preferred or advantageous over other embodiments. Moreover, the terms “embodiments of the invention,” “embodiments,” or “invention” do not require that all embodiments of the invention include the discussed feature, advantage, or mode of operation. 
         [0104]    A conventional fixed buttstock  110  attached to a rifle is illustrated in  FIG. 1 a   . A collapsible buttstock  120  attached to a rifle is shown in  FIG. 1 b   . Furthermore, a collapsible buttstock  130  attached to a submachine gun is illustrated in  FIG. 1 c   .  FIG. 1 a    illustrates a side view of a conventional buttstock attached to an AR15 or M16 style rifle.  FIG. 1 b    illustrates a side view of a collapsible buttstock attached to an M14 type rifle, and  FIG. 1 c    illustrates a side view of a collapsible buttstock attached to a submachine gun type firearm. The buttstock generally refers to the part of a rifle, or a submachine gun or other firearm, to which the firing mechanism is directly attached. The buttstock is held against one&#39;s shoulder when firing the gun. 
         [0105]    A collapsible buttstock makes the firearm more compact for storage or transport, but is usually deployed before shooting to enhance control. A collapsible buttstock collapses by telescoping (or sometimes folding) in on itself. As will be discussed below, a collapsible buttstock may employ more than one length setting, allowing the buttstock to be adjusted for different users and different firing modes. 
         [0106]    The collapsible buttstocks in  FIG. 1 e    may be attached to a submachine gun, this style of collapsible buttstock attaches to the firearm by securing the housing  160  to the firearm. The BSS  140  is supported by the two guide rods  160 , the BSS and the guide rods together form an assembly that can be moved and locked at a variety of positions with respect the firearm the collapsible buttstock is attached to. The housing  160  also comprises a mechanism (not shown) that allows locking the shoulder support and rods assembly in a variety of positions ranging from fully collapsed to fully extended positions, the operator of the firearm determines which position to lock the BSS, depending on operator&#39;s preference and the prevailing circumstances. 
         [0107]    Similar to the aforementioned collapsible buttstock, figure if illustrates a comparable buttstock that shares the same components with one difference, the collapsible buttstock in figure if can be used with AR style rifles, which utilize a buffer tube  150 , whereas the collapsible buttstock in  FIG. 1 e    can only be used with firearms that do not require a buffer tube, such as submachine guns. The housing  170  also contains a release trigger  190  and a safety mechanism  180 . 
         [0108]    Collapsible buttstocks are generally known, the inventive buttstock enables the firearm operator to automatically extend the buttstock to a fire-ready position with speed and little effort, thus, saving precious seconds, which would otherwise be spent getting the buttstock extended while possibly taking fire and being unable to return fire at an enemy. Saving a few seconds under such conditions could increase the chances of survivability of the firearm operator and those whom the operator might be trying to protect. 
         [0109]      FIGS. 2 a -2 e    and  FIGS. 3 a -3 o    illustrate the main components of the CBAD module. A housing  210  is secured to a firearm  1000 , the housing exterior is shaped so as support the firearm operator&#39;s cheek when the operator is taking aim through the firearm&#39;s sights. Housing  210 , as illustrated in  FIGS. 3 c -3 i   , comprises three openings that traverse it longitudinally  211 ,  212  and  213 . Openings  212  and  213  are similar in size. These openings support the guide rods  250  and  260 , respectively. Opening  211  is sized to allow clearance for the front portion  606  of the buffer tube  600  to go through it. The threaded portion at the front of the buffer tube  602  is threaded into the firearm. The buffer tube  600  has a stepped diameter, the larger diameter has an undulating or wavy contour  601 , the distance between the larger and smaller diameters forms a rim  603 , as the buffer tube is threaded into the firearm, rim  603  makes contact with the back face  222  of housing  210 , the pressure from the rim  603  onto the back face  222  of the housing keeps the housing secured to the firearm. Housing  210  comprise four openings (two of each  216  and  217 ) that traverse it vertically, openings  216  are configured to receive two roll pins  270 , and openings  217  receive two roll pins  280 . Also, the housing comprises a threaded hole  218  that traverses it vertically, this threaded hole receives a set screw  290 . When set screw  290  is threaded into the hole  218 , it makes contact with the buffer tube surface  601  and locks it in place. 
         [0110]    Housing  210  also comprises two channels  215 , these channels support and guide the release trigger  300 . A protrusion  220  extends from the front face  219  of the housing, upon assembly of the housing to the firearm, this protrusion is inserted into a matching hole in the firearm body and prevents the housing from rotating. Housing  210  comprises a threaded hole  311 , this hole is located at the center of the protrusion  220  and receives a spring loaded plunger. 
         [0111]    Housing  210  comprises a rim  214  at the bottom side, the outside surface of the rim protects from inadvertent contact with release trigger  300 , and the inner surface of the rim defines a guide for the operator&#39;s thumb to assist the firearm operator in finding and pushing the release trigger when needed. 
         [0112]    Housing  210  also holds the components for locking and releasing the buttstock, the bottom of the housing comprises a groove  223  that traverses the housing crosswise and is closer to the backside  222  of the housing, as illustrated in  FIG. 3 f   . The groove defines a channel for locking blocks  310  and  320  to be placed in, as illustrated in  FIG. 3 a   . When assembled helical spring  330  is disposed between the two blocks, also, the bottom of the housing comprises an opening with a rectangular cross section  224  that traverses the housing crosswise and is closer to the front side of the housing  219 . This opening receives the safety bar  370 . A post  226  protrudes within a cavity  225  at the bottom of the housing illustrated in  FIG. 3 i   , the post  226  provides an anchor for extension helical spring  340 . 
         [0113]    The two rods  250  and  260  illustrated in  FIGS. 3 a  and 3 b   , are inserted into openings  212  and  213  respectively, the front end of the rods  267  is first inserted into the openings, these rods are aligned with the slots  261  openings pointing upwards, as illustrated in  FIG. 3 b   . Once the slots  261  cross holes  216  ( FIG. 3 e   ) are aligned, roll pins  270  ( FIG. 3 a   ) can be inserted and will go through the slots  261  and holes  216 , the interaction between the pins  270  and the slots  261  maintains the alignment of the guide rods  250  and  260  and limits their travel to the extent of the slot length. 
         [0114]    The housing, the locking blocks, the release trigger, the guide rods and the BSS may be made out of ferrous or non-ferrous metals or alloys thereof, they can also be made out of polymers, composites or any material that can be machined, molded, cast or formed otherwise. 
         [0115]    The helical springs may be made out of alloy steel or other ferrous and non-ferrous metals and alloys thereof, the helical springs can also be made out of polymers or any material that can be elastically deformed and stores energy and upon restoration of its original form it discharges the stored energy. Helical springs  350  preferred spring constant “k” is 5 lb/in, and may range from 0.1 lb/in to 100 ld/in. Furthermore, the helical springs may be replaced by an energy storage device which stores energy as it is being compressed and upon release of the stored energy, the device expands and recovers its original physical dimensions. Several such embodiments may be hydraulic or pneumatic cylinders. 
         [0116]    The guide rods  250  and  260  ( FIG. 3 b   ) are hollow, creating a cavity to receive helical springs  350  ( FIG. 3 a   ), the rods are circular to match the mating openings  212  and  213  in the housing. In other embodiments, the guide rods may be elliptical, half round, rectangular, triangular or any other geometric shapes as long as the receiving opening has the matching geometry. The guide rods have notches  264 , a minimum of two notches per rod corresponding to the fully extended and fully retracted buttstock positions are needed. There is no maximum number of notches, the maximum number of notches is limited by the amount of space available on the rods. In the current embodiment, each guide rod will have three notches, which correspond to three positions. The notches are configured to be slightly wider than the locking blocks  310  and  320  ( FIG. 3 a   ). When the guide rods are assembled into the housing and the pins  270  ( FIG. 3 a   ) are inserted into the pin hole and pass through the slots  261 , the notches will be facing the housing, specifically the groove  223  ( FIG. 3 i   ), this configuration allows locking blocks  310  and  320  that will be contained within the groove  223  to communicate with the notches when the notches and groove are aligned. 
         [0117]    The buttstock shoulder support (BSS)  240  ( FIGS. 2 a -2 c    and  FIGS. 3 a,g  3 l , and 3 m   ) is a housing that has a front side  241  and a back side  242 . The front side comprises an opening  243  ( FIG. 3 l   ) that axially and partially penetrates the housing. The opening is sized so that it larger than the outside contour of the rear part  605  of the buffer tube  600  ( FIGS. 3 j  and 3 k   ). This configuration allows the BSS to telescopically move over the rear part of the buffer tube when the buttstock is collapsed. The BSS also comprises two openings  244  and  245  ( FIGS. 3 l  and 3 m   ). These openings axially penetrate the BSS and are sized so that the guide rods  250  and  260  ( FIG. 3 b   ) can be inserted and the back side  268  of the guide rods  250  and  260  ( FIG. 3 b   ) can be seen when looking directly at the back side of the BSS. The BSS housing also comprises an opening  246  that traverses the housing crosswise, the guide rods also each comprises an opening  265  ( FIG. 3 b   ) of similar size as opening  246 . The guide rods  250  and  260  are pushed into the openings  245  and  244 , until the crosswise openings  246  (from buttstock) and crosswise openings  265  (from guide rods) are aligned. Alignment of the aforementioned openings allows insertion of the roll pins  360  which will traverse both openings and secure the BSS  240  to the guide rods. Finally the BSS comprises two holes  247 , these holes are configured to receive quick disconnect sling swivels. 
         [0118]    When assembling the CBAD and before inserting the guide rods  250  and  260  into the BSS openings  244  and  245 , the helical springs  350  ( FIG. 3 a   ) are inserted into the opening  266  ( FIG. 3 b   ) of the guide rods. Once the roll pins  360  have been inserted into the openings  246 , the springs  350  become confined within the guide rods” cavity and the ends of the springs will be restricted by the roll pins  360  from the BSS side and roll pins  270  ( FIG. 3 a   ) from the housing side.  FIG. 3 n    is a top cross sectional view of the CBAD illustrating how spring  350  is restricted by pins  270  and pins  360 . Such configuration will cause the springs  350  to be compressed as the BSS is collapsed.  FIG. 4 a    illustrates the collapsed buttstock and illustrates the compressed spring  350 . At this position, the spring  350  has stored energy and is applying pressure against both pin sets  270  pins and  360  pins. When springs  350  are allowed to expand freely, the springs will expand in the direction of pin  360  (the direction of the BSS), the springs will continue to expand as long as the pin  270  has not made contact with the end  262  of the slot  261  ( FIG. 3 b   ), the interaction between pin  270  and end  262  of slot  261  will limit further helical spring  350  expansion and, therefore, the location of the BSS.  FIG. 4 c    illustrates the BSS in full extension along with the spring  350  in fully extended condition. 
         [0119]    Next is a detailed description of the components and function of the CBAD buttstock locking mechanism and safety.  FIGS. 5 a -5 i    and  FIGS. 6 a -6 f    and  FIGS. 8 a -8 b    illustrate the components and the function of the locking and safety of the CBAD. Locking blocks  310  and  320  ( FIG. 5 a -5 c   ) comprise a front side  314  and  324 , a back side with an opening  313  and  323 . The opening is sized to receive a helical spring  330  ( FIG. 3 a   ). A stepped thickness with two steps is on the top side  311  and  321 , the shoulder of the steps on the top side of the locking block form a tapered surface rounded at the sides  312  and  322 . The shoulder of the steps on the bottom side  317  and  327  of the block form a straight surface also with rounded sides  318  and  328 . The sides  315  and  316  for block  310 , and sides  325  and  326  for block  320  are parallel to each other within each block and are orthogonal to the front sides  314  and  324  and the top sides  311  and  321 . Once the blocks are placed in the groove  223  ( FIG. 3 i   ), the sides of the blocks control and guide the movement of the blocks within the groove. 
         [0120]      FIGS. 5 d -5 f    illustrate details of the release trigger  300 , the release trigger comprises a top side  302  a bottom side  301  a front side  304  and a back side  303 , the top surface comprises a depressed surface  309 , the distance between the top side  302  and the depressed surface  309  forms a step  308 , the step is contoured in such a way that it will receive the locking blocks  310  and  320  oriented with their top surfaces  311  and  321  making contact with the depressed surface  309 . Also, the tapered shoulders  312  and  322  on the locking blocks are in direct contact with the contoured step  308 . The aforementioned arrangement is further illustrated in  FIGS. 6 e  and 6 f   . A rectangular protrusion  307  extends from the depressed surface, this protrusion has a notch facing the front side of the release trigger, the notch acts as the second anchor for extension helical spring  340 . The front side of the release trigger interacts with the safety bar  370 . Two shelves  305  (one on each side of the release trigger) are received into the channels  215  ( FIGS. 3 a , 3 c , and 3 g   ) within the housing  210 , the interaction between shelves and channels directs the longitudinal travel of the release trigger within the housing  210 . 
         [0121]    The final component of the CBAD is the safety bar  370  ( FIGS. 5 g  and 5 h   ), the safety bar is a rectangular block with rounded edges, it has a top side  375  a bottom side  376 , a front side  371  and a back side  372 . The front side has two notches  377  and  378 , the notches are bound by side walls  379  and  380 , and the back side has two openings  373  and  374 . The safety bar is inserted into the housing  210  in opening  224  ( FIG. 3 d   ), with openings  373  and  374  facing the threaded hole  311  in the housing  210  ( FIG. 3 h   ). The arrangement of safety bar and release trigger is shown in  FIGS. 6 a  and 6 b   . The safety bar may traverse the housing crosswise from one side to the other, the crosswise travel is limited by the interaction between the side walls  379  and  380  and the sides of the release trigger  300 . There is further interaction between the spring loaded plunger  390  ( FIG. 5 i   ) and the openings  373  and  374  on the back side of the safety bar. In one position “safety on,” the spring loaded ball  391 at the tip of the plunger  390  will be partially inserted in opening  373 , as also illustrated in  FIG. 6 b   . In another position “safety off,” the spring loaded ball at the end of the plunger will be partially inserted in opening  374  ( FIG. 7 b   ). The interaction between the spring loaded plunger and the safety bar will result in a firm stoppage of the movement of the safety bar, this stoppage allows the firearm operator to tell when the safety bar has been set to “safety on” or “safety off” position. 
         [0122]      FIGS. 6 a -6 f , 7 a -7 d , 8 a -8 b , 9 a -9 d , and 10 a -10 d   , illustrate how the CBAD module works. Starting with  FIGS. 6 a -6 f   ,  FIG. 6 a    is a top view of the CBAD with the housing removed to reveal the CBAD components” interaction.  FIG. 6 b    illustrates an enlarged view of the component interaction. These aforementioned figures illustrate the interaction between the locking blocks  310  and  320  and the release trigger  300  and notches  264 . When the BSS is in the fully collapsed position and the safety is in the “safety on” position, note also the safety bar  370  position is blocking the advancement of the release trigger. The notch  377  ( FIG. 5 g   ) is directly in front of the front side  304  of the release trigger ( FIG. 5 f   ), blocking further advancement of the release trigger. In this position the ball  391  on the spring loaded plunger  390  ( FIG. 5 i   ) is partially inserted into the opening  373  on the safety bar ( FIG. 5 h   ), this interaction keeps the safety bar from moving inadvertently. Also, extension helical spring  340 , maintains tension on the release trigger pulling it away from the safety bar. Two roll pins  280  and  290  form a stop and keep the release trigger from completely retracting and exiting the housing. The locking blocks  310  and  320  are in the extended position and their front sides  314  and  324  ( FIG. 5 a   ) are resting against the bottom of the notches  264 . The locking blocks are biased to stay in the extended position due to the helical spring  330  being disposed between them. This interaction between locking blocks and notches keeps the buttstock in the collapsed position, in this position helical springs  350  ( FIG. 3 a   ) are partially or fully compressed ( FIG. 4 a   ).  FIGS. 6 c  and 6 d    illustrate a bottom view of the CBAD with the housing removed.  FIG. 6 d    is an enlarged view of a portion of the CBAD illustrating the release trigger and its interaction with the safety bar and the locking blocks  310  and  320  resting at the bottom of the notches  264 .  FIGS. 6 e  and 6 f    illustrate the interaction between the locking blocks  310  and  320 , specifically, the tapered surfaces  312  and  322  and the release trigger  300 , specifically the contoured geometry  308 . 
         [0123]      FIGS. 7 a -7 d    illustrate the first stage to releasing the buttstock. Safety bar  270  is moved so that notch  378  ( FIG. 5 g   ) is directly in front of the release trigger front side  304 , the release trigger is pushed forward until its progress is blocked by the far end of notch  378 . The interaction between the release trigger contoured surface  308  ( FIG. 3 e   ) and the tapered surfaces  312  and  322  of the locking blocks , also detailed in  FIGS. 8 a  and 8 b   , will cause the locking blocks to retract from their guide rod locking positions. This retraction will result in the release of guide rods  250  and  260 ,  FIGS. 7 a  and 7 b    illustrate the aforementioned steps from a top view of the CBAD, while  FIGS. 7 c  and 7 d    illustrate the aforementioned steps from a bottom view of the CBAD. 
         [0124]    Upon release of the guide rods, the helical springs  350  which were compressed as illustrated in  FIG. 4 a   , are able to expand freely and release the stored energy. Once helical spring is fully expanded ( FIG. 4 c   ), the shoulder buttstock is in the fully extended position. As the guide rods move, their orientation is maintained due to the interaction between pins  270  and the slots  261 . The guide rods will stop any further displacement once the ends  262  of the slots  261  make contact with pins  270 . When this occurs, the BSS is in full extension. The positions of the ends  262  of the slots  261  and the notches  264  closest to the front side of the guide rods are directly facing the groove  223 , this configuration will allow the locking blocks  310  and  320  to rest into the notches when the blocks are allowed to advance to the locking position.  FIG. 9 a    illustrates a top view (with housing removed) of the safety bar  370  in “safety off”, release trigger  300  in the advanced position and making contact with the far end of notch  378  ( FIG. 5 g   ) and the helical springs  350  in the fully extended position. Also, expanded spring  350  is illustrated in  FIG. 4 c   .  FIG. 9 b    is an enlarged view of the interaction of the aforementioned components.  FIGS. 9 c  and 9 d    illustrate a bottom view of the CBAD with the housing removed, and these figures illustrate the aforementioned interaction between the CBAD components. 
         [0125]    Finally, the release trigger is retracted, this will occur when forward pressure on it is ceased. The release trigger  300  will retract due to tension in the compression helical spring  340 , the spring tension will pull the release trigger back from the safety bar. The release trigger will stop further retraction when it makes contact with roll pins  280 . Retraction of the release trigger will cause the locking blocks to advance to the locking position where they will rest in the notch with their front sides  314  and  324 , making contact with the bottoms of the notches. The safety bar  370  can be moved to the “safety on” position which will block any forward displacement of the release trigger, thus, locking the buttstock in the fully extended position.  FIGS. 10 a  and 10 b    are top views illustrating the aforementioned CBAD components interaction, and  FIGS. 10 c  and 10 d    are bottom views illustrating the CBAD components mentioned above. 
         [0126]    As aforementioned, the guide rods  250  and  260  in this embodiment will each have three notches  264 . However, it is to be understood that the guide rods can each have four, five or more notches, the number being limited by the space available on the guide rods and by the desired buttstock positions. Each pair of notches (one notch per guide rod) correspond to one BSS position. The BSS collapsed position (position  1 ) and the fully extended position (position  3 ) have been discussed. Position  2 , which is in between position  1  and position  3 , can be accomplished by first placing the safety in the “safety off” position, moving the release trigger forward, then applying pressure onto the BSS  240  to advance it forward. Once the BSS  240  starts advancing pressure should be taken off the release trigger  300 , which, in turn, will allow the locking blocks  310  and  320  to be pushed to the locking position. However, the locking blocks will not be able to advance as long as they are touching the outside contour of the guide rods  250  and  260 , as the guide rods continue to advance the locking blocks will eventually be aligned with the notches  264 . This will allow the locking blocks to advance until their front sides  314  and  324  make contact with the bottoms of the notches. At this instance, the CBAD is locked in position  2 .  FIG. 11 a    illustrates a side view of the CBAD module attached to a firearm and locked in position  1 ,  figure 11 d    illustrates a side view of the CBAD module to a firearm locked in position  2 .  FIG. 11 g    illustrates a side view of the CBAD module attached to a firearm locked in position  1 . 
         [0127]    In one embodiment, the BSS  240  is replaced with a Recoil Mitigation Buffer Floating module (RMBF), the RMBF is described in detail in patent application # 386480.  FIG. 12 a    illustrates a rear perspective view of the CBAD module retrofitted with an RBMF module  700 .  FIGS. 12 b    is a side view of the same embodiment and  FIGS. 12 c  and 12 d    are back view and front views of the same embodiment.  FIG. 13 a    is a rear bottom perspective side view of the embodiment and  FIG. 13 b    is a perspective rear top view of the embodiment with the firearm removed.  FIG. 14  a is a side view of the embodiment with the BSS in position  3 ,  FIG. 14 d    is a side view of the embodiment in position  2 , and  FIG. 14 g    is a side view of the embodiment in position  1 .  FIG. 15 a    is a rear perspective assembly view of the CBAD module with the RMBF module attached to it. All the components used in the CBAD module remain the same, the only modification being the replacement of the BSS with the RMBF module.