Patent Publication Number: US-9841250-B1

Title: Firearm covers

Description:
FIELD 
     The present disclosure relates to firearm covers. 
     BACKGROUND 
     In the sports of firearm shooting and hunting, as well as in military and civilian firearm training, it may be desirable to disable a firearm in such a way that it is visually apparent that the firearm is temporarily incapable of being fired. As an example, a firing range may enforce rules that dictate that a firearm be rendered inoperative in a visually verifiable manner before the firearm may be transported to or from a firing stall. Moreover, outside of firing ranges, it is paramount that firearms be handled in a safe manner, whether during hunting activities or during firearm training, for example. However, traditional means of rendering a firearm inoperative, such as securing the firearm in a case, may be cumbersome or inconvenient in various circumstances. 
     SUMMARY 
     The present disclosure relates to firearm covers, such as may be used to restrict a firearm from being fired. A firearm cover includes a body defining a partially enclosed region sized and shaped to receive at least a portion of a firearm receiver of a firearm and configured to transition between a clamped conformation and an open conformation, with the body being biased toward the clamped conformation. In the clamped conformation, the body is retained on the firearm receiver, and in the open conformation, the body is configured to be selectively placed over and removed from the firearm receiver. The body includes a first side wall having a first lip and a second side wall opposite the first side wall and having a second lip. The first side wall is configured to at least partially cover a first side of the firearm receiver when the firearm receiver is operatively received in the partially enclosed region, and the second side wall is configured to at least partially cover a second side of the firearm receiver when the firearm receiver is received in the partially enclosed region. The first lip and the second lip define a longitudinal opening to the partially enclosed region between the first lip and the second lip. The first lip and the second lip are spaced further apart in the open conformation than in the clamped conformation. The first side wall and the second side wall define a forward opening to the partially enclosed region and a rear opening to the partially enclosed region such that, when the firearm receiver is operatively received in the partially enclosed region, the firearm extends through the forward opening and the rear opening. The body further includes a connecting region extending between the first side wall and the second side wall. The firearm cover further includes means for restricting the firearm from being fired when the firearm receiver is operatively received in the partially enclosed region. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic right side elevation view representing a firearm cover installed on a firearm. 
         FIG. 2  is a schematic rear elevation view representing the firearm cover of  FIG. 1 . 
         FIG. 3  is a right side elevation view representing a barrel sheath of a firearm cover. 
         FIG. 4  is a front right perspective view representing a firearm cover configured to be installed on a magazine-fed semi-automatic rifle. 
         FIG. 5  is a right side elevation view representing the firearm cover of  FIG. 4  installed on a magazine-fed semi-automatic rifle. 
         FIG. 6  is a left side elevation view representing the firearm cover of  FIGS. 4-5  installed on the magazine-fed semi-automatic rifle. 
         FIG. 7  is a front left perspective view representing a firearm cover configured to be installed on an AK-pattern rifle. 
         FIG. 8  is a right side elevation view representing the firearm cover of  FIG. 7  installed on an AK-pattern rifle. 
         FIG. 9  is a left side elevation view representing the firearm cover of  FIGS. 7-8  installed on the AK-pattern rifle. 
         FIG. 10  is a right side elevation view representing a firearm cover installed on a lever action rifle. 
         FIG. 11  is a right side elevation view representing a firearm cover installed on a bolt action rifle. 
         FIG. 12  is a right side elevation view representing a firearm cover installed on a semi-automatic shotgun. 
         FIG. 13  is a right side elevation view representing a firearm cover installed on a pump-action shotgun. 
     
    
    
     DESCRIPTION 
       FIGS. 1-13  provide illustrative, non-exclusive examples of firearm covers  100 , of components and/or features of firearm covers  100 , and/or of firearm covers  100  installed on firearms  10 , according to the present disclosure. Elements that serve a similar, or at least substantially similar, purpose are labeled with like numbers in each of  FIGS. 1-13 , and these elements may not be discussed in detail herein with reference to each of  FIGS. 1-13 . Similarly, all elements may not be labeled in each of  FIGS. 1-13 , but reference numerals associated therewith may be utilized herein for consistency. Elements, components, and/or features that are discussed herein with reference to one or more of  FIGS. 1-13  may be included in and/or utilized with any of  FIGS. 1-13  without departing from the scope of the present disclosure. 
     Generally, in  FIGS. 1-2 , elements that are likely to be included in a given example are illustrated in solid lines, while elements that are optional to a given example are illustrated in broken lines. However, elements that are illustrated in solid lines are not essential to all examples of the present disclosure, and an element shown in solid lines may be omitted from a particular example without departing from the scope of the present disclosure. 
       FIGS. 1-2  are schematic representations of firearm covers  100 . Specifically,  FIG. 1  is a schematic right side view representing a firearm cover  100  installed on a firearm  10 , and  FIG. 2  is a schematic rear view representing the firearm cover. In  FIG. 1 , firearm  10  is schematically represented as a magazine-fed semi-automatic rifle; however, firearm covers  100  may be configured for use with any configuration or style of firearms, including firearms and rifles not explicitly illustrated in the drawings. As illustrated in  FIG. 1 , firearm  10  includes a firearm receiver  20  that has a first receiver side  22  and a second receiver side  24 . As used herein, firearm receiver  20  also may be referred to as a receiver  20 , and generally refers to the component and/or portion of firearm  10  that includes a firing mechanism of the firearm. As illustrated in  FIG. 1 , first receiver side  22  may refer to a right side of receiver  20  and/or second receiver side  24  may refer to a left side of receiver  20 . However, this is not required, and it is within the scope of the present disclosure that first receiver side  22  and second receiver side  24  may refer to any appropriate respective sides, faces, and/or components of receiver  20 . 
     In some firearms  10 , receiver  20  includes a magazine well  40  configured to receive a magazine of ammunition. As an example, firearm  10  may be configured to fire ammunition in the form of an ammunition cartridge that includes a bullet and a shell, and the magazine may be configured to carry a plurality of ammunition cartridges. Firearm  10  and/or receiver  20  may include a hammer that may be selectively cocked and/or decocked, and/or may include a trigger  42  that may be selectively actuated to fire a bullet, such as by releasing the hammer from a cocked position and/or by otherwise causing a primer of the ammunition cartridge to be ignited. Upon being fired, the bullet may pass through a barrel  48  of firearm  10  such that the bullet exits the firearm through a muzzle  46  of the barrel. Firearm  10  and/or receiver  20  also may include an ejection port  26  through which the shell of the ammunition cartridge may be expelled upon firing. In some embodiments of firearm  10 , such as an embodiment that lacks magazine well  40 , ejection port  26  additionally or alternatively may refer to an aperture through which an ammunition cartridge may be loaded into receiver  20 . In such an embodiment, ejection port  26  additionally or alternatively may be referred to as a loading port  26 . 
     As used herein, the terms “selective” and “selectively,” when modifying an action, movement, configuration, or other activity of one or more components or characteristics of an apparatus, mean that the specific action, movement, configuration, or other activity is a direct or indirect result of user manipulation of an aspect of, or one or more components of, the apparatus. 
     As further illustrated in  FIG. 1 , firearm  10  and/or receiver  20  additionally may include a bolt  28  configured to restrict a rear end of barrel  48 . Bolt  28  may be selectively translated in a fore-aft direction, such as to permit an ammunition cartridge to enter barrel  48  (such as via magazine well  40  and/or ejection port  26 ) and/or to at least substantially isolate barrel  48  from magazine well  40  and/or from ejection port  26 . More specifically, bolt  28  may be selectively translated between a forward position, in which firearm  10  may be fired, and an aft (or rearward) position, in which an ammunition cartridge may be inserted into barrel  48  and in which the firearm is incapable of being fired. Stated differently, firearm  10  may be said to be disabled from being fired when bolt  28  is restricted from reaching the forward position. 
     In some firearms  10 , such as so-called bolt-action rifles, firearm  10  further may include a bolt handle  30  configured to selectively translate bolt  28 . As an example, in an embodiment of firearm  10  in which bolt  28  is manually actuated between the forward and aft position, bolt handle  30  may be fixedly coupled to the bolt and configured to be gripped and actuated by the user. In an embodiment in which firearm  10  is a semi-automatic firearm, bolt handle  30  additionally or alternatively may be referred to as a charging handle  30 , and/or may be configured to be selectively translated by a user primarily and/or exclusively in the aft direction. Additionally or alternatively, firearm  10  may include a lever configured to be selectively actuated to load an ammunition cartridge into barrel  48 . 
     As used herein, positional terms such as “left,” “right,” “forward,” “rear,” “fore,” “aft,” “upper,” “lower,” and the like generally are recited with respect to a direction in which firearm  10  is aimed. For example, barrel  48  may be described as being forward of receiver  20 , and a right side of firearm  10  may describe a side of firearm  10  that faces the user when firearm  10  is aimed to the right of the user. 
     Firearm  10  still further may include a safety lever  36  configured to be selectively actuated by the user to transition the firearm between an operative mode, in which the firearm may be fired, and a safety mode, in which the firearm is restricted from being fired. Safety lever  36 , when present, may be positioned on first side  22  and/or on second side  24  of receiver  20 . Firearm  10  also may include a trigger guard  44  extending at least partially around trigger  42  and configured to block the trigger from being inadvertently struck and/or actuated. 
     Firearm  10  may be configured to be utilized in conjunction with one or more firearm accessories  50  operatively coupled to the firearm. As examples, and as illustrated in  FIG. 1 , examples of firearm accessory  50  include a light coupled to a lower side of barrel  48 , a sight extending from an upper side of the barrel, a scope extending from an upper side of firearm  10 , and a chamber flag  52  configured to be selectively inserted into the barrel via ejection port  26 . More specifically, chamber flag  52  may include an elongate element configured to be inserted into barrel  48  such that bolt  28  is restricted from being translated to the forward position, thereby preventing firearm  10  from being fired. Additionally or alternatively, firearm cover  100  may incorporate chamber flag  52  as a component of firearm cover  100 , including standard or traditional features (e.g., shapes and colors) of chamber flags  52 , such that the presence of chamber flag  52  is readily apparent to knowledgeable personnel when viewing firearm  10  with firearm cover  100  operatively installed on firearm  10 . As another example, firearm  10  may include a stock  54  at a rear end of the firearm configured to be supported by the user&#39;s body, such as the user&#39;s shoulder, such as to steady the firearm before firing. 
     As illustrated in  FIG. 1 , firearm cover  100  may be operatively installed on firearm  10  to restrict and/or prevent firing of the firearm. With reference to  FIGS. 1-2 , firearm cover  100  includes a body  110  defining a partially enclosed region  114  sized and shaped to operatively receive at least a portion of receiver  20 . As used herein, receiver  20  may be said to be operatively received in partially enclosed region  114  when the receiver is fully received in the partially enclosed region and/or is received in its intended position within the partially enclosed region, such as a position in which firearm  10  is disabled and/or restricted from being fired by firearm cover  100 . 
     Body  110  may include an outer surface  112  positioned opposite partially enclosed region  114 . Body  110  may be shaped to conform to an outer surface of receiver  20  when the receiver is operatively received in partially enclosed region  114 . For example, firearm cover  100  may be configured to be utilized with a given style and/or model of firearm  10 , and body  110  may include at least one firearm conforming feature shaped to receive and/or conform to a feature and/or portion of receiver  20  that characterizes the given style or model of firearm. As more specific examples, firearm cover  100  may be configured to be utilized with a firearm  10  in the form of one or more of an AR-pattern rifle, a magazine-fed rifle, a magazine-fed semi-automatic rifle, an AK-pattern rifle, a semi-automatic rifle, an automatic rifle, a long rifle, a hunting rifle, a bolt action rifle, a lever action rifle, a shotgun, a pump-action shotgun, a semi-automatic shotgun, a black powder rifle, and/or a muzzle-loader rifle. However, it is additionally within the scope of the present disclosure that firearm cover  100  be utilized in conjunction with any appropriate firearm  10 . 
     Body  110  may be configured to only partially enclose receiver  20  when the receiver is operatively received in partially enclosed region  114 . As examples, firearm cover  100  and/or body  110  may enclose at least 25%, at least 40%, at least 60%, at least 80%, at most 95%, at most 90%, at most 85%, at most 70%, and/or at most 50%, or in some examples 100%, of receiver  20  when the receiver is operatively received in partially enclosed region  114 . Additionally or alternatively, in some examples, firearm cover  100  and/or body  110  may not extend over barrel  48  and/or may not extend over stock  54  when the receiver is operatively received in partially enclosed region  114 ; however, in other examples, firearm cover  100  and/or body  110  may extend over barrel  48  and/or may extend over stock  54  when the receiver is operatively received in partially enclosed region  114 . Additionally or alternatively, firearm cover  100  may be free of an external structure for operatively retaining firearm  10  on an article of clothing, such as a belt clip or a harness attachment point. 
     Firearm cover  100  is configured to transition between a clamped conformation (as illustrated in solid lines in  FIG. 2 ), in which body  110  is retained on receiver  20 , and an open conformation (as illustrated in dash-dot-dot lines in  FIG. 2 ), in which the body is configured to be selectively placed over and removed from the receiver. Body  110  generally is biased toward the clamped conformation, such as to prevent firearm cover  100  from being inadvertently removed from receiver  20 . Body  110  includes a first side wall  120  with a first lip  122  and a second side wall  124  opposite the first side wall and with a second lip  126 . First lip  122  and second lip  126  are spaced further apart when body  110  is in the open conformation relative to when the body is in the clamped conformation. First side wall  120  is configured to at least partially cover first receiver side  22  and second side wall  124  is configured to at least partially cover second receiver side  24  when receiver  20  is operatively received in partially enclosed region  114 . 
     First lip  122  and second lip  126  define a longitudinal opening  128  to partially enclosed region  114  between the first lip and the second lip. As used herein, a longitudinal direction is intended to indicate a direction that is generally aligned with a length of firearm  10 , such as a direction that is parallel, or at least substantially parallel, to a length of barrel  48 . First side wall  120  and second side wall  124  define a forward opening  130  and a rear opening  132  to partially enclosed region  114 , such that firearm  10  extends through each of the forward opening and the rear opening when receiver  20  is operatively received in the partially enclosed region. Body  110  further includes a connecting region  134  extending between and connecting first side wall  120  and second side wall  124 . Body  110  additionally may include a removal tab  182  projecting from connecting region  134  and configured to be gripped by the user to facilitate removal of firearm cover  100  from firearm  10  and/or installation of the firearm cover onto the firearm. 
     Body  110  may be constructed of any appropriate material. For example, body  110  may be constructed of a semi-rigid, flexible material, such as a material that has an internal bias that biases the body toward the clamped conformation. As more specific examples, body  110  may include, consist of, and/or consist essentially of a plastic, a thermoplastic, a thermoset plastic, and/or an acrylic-polyvinyl chloride such as sold under the KYDEX™ brand, but other materials also may be used. Additionally or alternatively, body  110  may include a soft inner liner  116  facing partially enclosed region  114 , which may be configured and/or selected to resist damaging, scratching, and/or marring receiver  20 . Soft inner liner  116  may be constructed of any appropriate material, such as a fabric material, a felt material, and/or leather. 
     Body  110  may be biased toward the clamped conformation in any appropriate manner. For example, body  110  may be integrally biased toward the clamped conformation, and/or may be described as being, defining, and/or including a spring clip. Additionally or alternatively, body  110  may be internally biased toward the clamped conformation, and/or may include a spring  136  operatively coupled to the body that biases the body toward the clamped conformation. Additionally or alternatively, body  110  may include a hinge  138  configured to facilitate transition of the body between the open conformation and the clamped conformation. When present, hinge  138  may be operatively coupled to connecting region  134 , or may be a component of connecting region  134 . 
     Firearm cover  100  may be configured to be installed on firearm  10  in any appropriate manner. For example, body  110  may be configured to be operatively placed over and removed from receiver  20  from a lower side of the receiver, and/or longitudinal opening  128  may be positioned adjacent an upper side of the receiver when the receiver is operatively received in partially enclosed region  114 . Additionally or alternatively, body  110  may be configured to be operatively placed over and removed from receiver  20  from the upper side of the receiver, and/or longitudinal opening  128  may be positioned adjacent the lower side of the receiver when the receiver is operatively received in partially enclosed region  114 . 
     In some examples, receiver  20  may be positioned within longitudinal opening  128  when the receiver is operatively received in partially enclosed region  114 . In such a configuration, first lip  122  and/or second lip  126  may engage and/or apply a retention force to receiver  20  when the receiver is operatively received in partially enclosed region  114 . Alternatively, in other examples, longitudinal opening  128  and/or at least one of first lip  122  and second lip  126  may extend adjacent to receiver  20  when the receiver is operatively received in the partially enclosed region. Additionally or alternatively, first lip  122  may extend toward partially enclosed region  114  relative to an adjacent portion of first side wall  120 , and/or second lip  126  may extend toward the partially enclosed region relative to an adjacent portion of second side wall  124 , such as schematically and optionally illustrated in  FIG. 2 . In such a configuration, first lip  122  and/or second lip  126  may be described as being inwardly directed lips. 
     With continued reference to  FIGS. 1-2 , firearm cover  100  may include an upper retainer  140  operatively coupled to one of first side wall  120  and second side wall  124  and configured to be selectively extended across longitudinal opening  128  and temporarily coupled to the other of the first side wall and the second side wall, such as to restrict removal of receiver  20  from partially enclosed region  114  through the longitudinal opening when the receiver is operatively received in the partially enclosed region. Additionally or alternatively, firearm cover  100  may include a front retainer  144  operatively coupled to one of first side wall  120  and second side wall  124  and configured to be selectively extended across forward opening  130  and temporarily coupled to the other of the first side wall and the second side wall, such as to restrict removal of receiver  20  from partially enclosed region  114  through the forward opening when the receiver is operatively received in the partially enclosed region. Additionally or alternatively, firearm cover may include a rear retainer  142  operatively coupled to one of first side wall  120  and second side wall  124  and configured to be selectively extended across rear opening  132  and temporarily coupled to the other of the first side wall and the second side wall, such as to restrict removal of receiver  20  from partially enclosed region  114  through the rear opening when the receiver is operatively received in the partially enclosed region. Upper retainer  140 , front retainer  144 , and/or rear retainer  142 , when present, may include and/or be any appropriate structure, such as a strap, an elastic strap, a clip, and/or a protrusion. Additionally, upper retainer  140 , front retainer  144 , and/or rear retainer  142 , when present, may be operatively and selectively coupled to first side wall  120  and/or second side wall  124  by any appropriate mechanism, such as a hook-and-loop fastener, a button fastener, a magnetic fastener, a snap fastener, and/or a clip fastener. 
     Firearm cover  100  generally is configured to prevent and/or restrict firearm  10  from being fired when receiver  20  is operatively received in partially enclosed region  114 . To accomplish this, firearm cover  100  may include at least one disabling structure  150  configured to physically disable firearm  10  so as to prevent it from being fired when receiver  20  is operatively received in partially enclosed region  114 . Disabling structure  150  may be defined by body  110  of firearm cover  100 , may be operatively coupled to the body, and/or may extend from the body. Additionally, firearm cover  100  may be configured to provide a visual indication of the presence and/or nature of the at least one disabling structure  150 . For example, outer surface  112  of body  110  may include highly conspicuous indicia and/or have a highly conspicuous color, which may represent or otherwise indicate the at least one disabling structure  150 . As more specific examples, outer surface  112  may have a bright color, a fluorescent color, a neon color, a reflective color, and/or a color and/or indicia generally understood within the sport of firearm shooting to indicate a specific state of safety and/or inoperability of firearm  10 . 
     As a first example of disabling structure  150 , and as schematically illustrated in  FIGS. 1-2 , the at least one disabling structure  150  may include a bolt restriction structure  152  positioned to extend within ejection port  26  of firearm  10  when bolt  28  of the firearm is open and when receiver  20  is operatively received in partially enclosed region  114 , thereby preventing closure of the bolt and firing of the firearm. When present, bolt restriction structure  152  may extend from first side wall  120  or second side wall  124  and into partially enclosed region  114 . Additionally or alternatively, bolt restriction structure  152  may include chamber flag  52  and/or be configured to operatively and selectively receive chamber flag  52 . In some examples, the bolt restriction structure may extend over, or cover, an entirety of ejection port  26 . In other examples, the bolt restriction structure may extend over, or cover, only a portion of ejection port  26 , such as a rear, or aft, region of the ejection port. In such examples, the bolt restriction structure may prevent the bolt from closing and thus the firing of the firearm, but also a user may still visually see within the ejection port, and in some instances, the firing chamber, and thus be able to see if a cartridge is in the firing chamber. Additionally or alternatively, such examples may permit for a chamber flag  52  to be operatively installed into the firing chamber and ejection port even when the firearm cover is operatively installed on the firearm. 
     As a second example of disabling structure  150 , and as schematically illustrated in  FIG. 1 , in an embodiment of firearm cover  100  configured to be installed on a firearm  10  that includes charging handle  30 , the at least one disabling structure  150  additionally or alternatively may include a charging handle restriction structure  154  positioned to restrict movement of the charging handle when receiver  20  is operatively received in partially enclosed region  114 . In an embodiment of firearm cover  100  that includes charging handle restriction structure  154 , and when receiver  20  is operatively received in partially enclosed region  114 , the charging handle restriction structure may be positioned to restrict rearward movement of the charging handle when the charging handle is in a forward position, and/or may be positioned to restrict forward movement of the charging handle when the charging handle is in a rearward position. 
     As a third example of disabling structure  150 , and as schematically illustrated in  FIG. 1 , in an embodiment of firearm cover  100  configured to be installed on a firearm  10  in the form of a bolt action rifle that includes bolt handle  30 , the at least one disabling structure  150  additionally or alternatively may include a bolt handle restriction structure  156  positioned to restrict motion of the bolt handle when receiver  20  is operatively received in partially enclosed region  114 . In an embodiment of firearm cover  100  that includes bolt handle restriction structure  156 , and when receiver  20  is operatively received in partially enclosed region  114 , the bolt handle restriction structure may be positioned to restrict closure of bolt  28  of firearm  10  when the bolt is open, thereby preventing the firearm from being fired. Additionally or alternatively, bolt handle restriction structure  156  may be positioned to restrict opening of bolt  28  when the bolt is closed, such as to prevent the user from loading an ammunition cartridge into firearm  10 . 
     As a fourth example of disabling structure  150 , and as schematically illustrated in  FIG. 2 , in an embodiment of firearm cover  100  configured to be installed on a firearm  10  that includes an external hammer, the at least one disabling structure  150  additionally or alternatively may include a hammer restriction structure  158  positioned to restrict motion of the hammer when receiver  20  is operatively received in partially enclosed region  114 . In an embodiment of firearm cover  100  that includes hammer restriction structure  158 , and when receiver  20  is operatively received in partially enclosed region  114 , the hammer restriction structure may be positioned to restrict movement of the external hammer from a cocked position toward a decocked position, may be positioned to restrict movement of the external hammer from the decocked position toward the cocked position, and/or may be positioned to restrict movement of the external hammer from a half-cocked position toward both the cocked position and the decocked position. Thus, hammer restriction structure  158  may prevent firearm  10  from being fired by preventing the external hammer from translating as necessary to complete a firing process. As a more specific example, hammer restriction structure  158  may include and/or be a hammer notch  118  defined by first side wall  120  (and/or first lip  122  thereof) and/or by second side wall  124  (and/or second lip  126  thereof) and positioned to receive the external hammer when receiver  20  is operatively received in partially enclosed region  114 . Additionally or alternatively, hammer restriction structure  158  may include and/or be a structure that physically covers the external hammer of a firearm, both restricting access to the external hammer and restricting movement of the external hammer to prevent firearm  10  from being fired when receiver  20  is operatively received in partially enclosed region  114 . 
     As a fifth example of a disabling structure  150 , in an embodiment of firearm cover  100  configured to be installed on a lever action rifle, the disabling structure  150  may be configured to extend between the lever and the adjacent body of the lever action rifle when receiver  20  is operatively received in partially enclosed region  114 , such that the disabling structure prevents a reloading process from completing and thus prevents the firing mechanism of the lever action rifle from being in an operative condition for firing. 
     Firearm cover  100  additionally or alternatively may include at least one restricting structure  160  configured to physically restrict firearm  10  from being fired when receiver  20  is operatively received in partially enclosed region  114 . In particular, whereas disabling structure  150  is configured to physically disable firearm  10  from being fired, restricting structure  160  instead is configured to inhibit the firearm from being fired even if the firearm is physically capable of being fired. Stated differently, disabling structure  150  may refer to a structure that interrupts and/or inhibits a firing mechanism of firearm  10  from reaching an operable configuration, whereas restricting structure  160  may refer to a structure that inhibits the firing mechanism from being activated even if the firing mechanism is otherwise operational. Restricting structure  160  may be defined by body  110  of firearm cover  100 , may be operatively coupled to the body, and/or may extend from the body. 
     As a first example of restricting structure  160 , and as schematically illustrated in  FIG. 1 , the at least one restricting structure  160  may include a safety restriction structure  162  positioned to restrict movement of safety lever  36  of firearm  10  when receiver  20  is operatively received in partially enclosed region  114 . Safety restriction structure  162  may be positioned on first side wall  120 , on second side wall  124 , or on another portion of firearm cover  100 . Additionally or alternatively, safety restriction structure  162  may be a first safety structure  162  positioned on first side wall  120 , and body  110  also may include a second safety restriction structure  164  positioned on second side wall  124 . Such a configuration may be beneficial, for example, when utilizing firearm cover  100  with a firearm  10  that includes a safety lever on each of first body side  22  and second body side  24 , such as may be present on an ambidextrous firearm. Additionally or alternatively, in some examples, safety restriction structure  162  may be configured to operate, or otherwise move, safety lever  36  when firearm cover  100  is operatively placed on firearm  10 , such as with safety restriction structure  162  engaging and moving safety lever  36  as firearm cover  100  is operatively installed on receiver  20 . 
     As a second example of restricting structure  160 , and as schematically illustrated in  FIGS. 1-2 , the at least one restricting structure  160  may include a trigger cover  166  configured to cover at least trigger  42  and optionally trigger guard  44  of firearm  10 , such as to prevent access to the trigger when receiver  20  is operatively received in partially enclosed region  114 . As an example, trigger cover  166  may include and/or be a region of each of first side wall  120  and second side wall  124  configured to cover trigger  42  and/or trigger guard  44 , and/or may be indented toward partially enclosed region  114 . 
     As a third example of restricting structure  160 , and as schematically illustrated in  FIGS. 1-2 , the at least one restricting structure  160  may include a magazine well structure  168  positioned to extend within magazine well  40  of firearm  10  when receiver  20  is operatively received in partially enclosed region  114 . Magazine well structure  168  thus may prevent insertion of a magazine into magazine well  40  when receiver  20  is operatively received in partially enclosed region  114 . Similarly, magazine well structure  168  and/or firearm cover  100  that includes the magazine well structure may be configured such that receiver  20  cannot be operatively received in partially enclosed region  114  if a magazine is positioned within magazine well  40 . Magazine well structure  168  may include and/or be any appropriate structure configured to extend into magazine well  40 . For example, and as illustrated in  FIGS. 1-2 and 4-9 , magazine well structure  168  may be a structure that extends from connecting region  134  into partially enclosed region  114 . However, this is not required, and it is within the scope of the present disclosure that magazine well structure  168  may extend into partially enclosed region  114  from any appropriate component of body  110 , such as from first side wall  120  and/or from second side wall  124 , such as depending on the configuration of firearm  10 . 
     As a fourth example of restricting structure  160 , in an embodiment of firearm cover  100  configured to be installed on a lever action rifle, first side wall  120  and/or second side wall  124  may be configured to cover a lever of a lever action rifle when receiver  20  is operatively received in partially enclosed region  114 . In such a configuration, firearm cover  100  may restrict a firearm  10  from being fired by preventing the lever from translating as necessary to complete a reloading process. 
     With continued reference to  FIG. 1 , firearm cover  100  additionally may include a barrel sheath  170  with an elongate flexible portion  172  operatively coupled to body  110  and a muzzle cup  178  operatively coupled to the elongate flexible portion. Muzzle cup  178  may define a muzzle volume  180  configured to operatively receive muzzle  46  of firearm  10 . Elongate flexible portion  172  may be sized to extend forward of body  110  along barrel  48  of firearm  10  and to at least partially enclose the barrel when receiver  20  is operatively received in partially enclosed region  114  and when muzzle  46  is operatively received in muzzle volume  180 . Barrel sheath  170  may be configured to be selectively uncoupled from and recoupled to body  110 . For example, barrel sheath  170  and/or body  110  may include a releasable fastener, examples of which include a hook-and-loop fastener, a button fastener, a snap fastener, and a zipper fastener. Additionally or alternatively, and as illustrated in  FIG. 3 , barrel sheath  170  may be configured such that elongate flexible portion  172  may be at least partially received in, and optionally fully received in, muzzle cup  178  and/or muzzle volume  180  thereof, such as for convenient storage of the barrel sheath when uncoupled from body  110 . 
     As schematically illustrated in  FIG. 1 , elongate flexible portion  172  of barrel sheath  170  may define an upper slit  174  that extends at least partially along an upper side of the elongate flexible portion and/or a lower slit  176  that extends at least partially along a lower side of the elongate flexible portion. Upper slit  174  and/or lower slit  176  may be sized to permit firearm accessory  50  to extend therethrough when the firearm accessory is coupled to firearm  10 . Elongate flexible portion  172  may be constructed of any appropriate material, such as a stretchy material, a fabric material, and/or an elastic material. Additionally or alternatively, elongate flexible portion  172  may be constructed of a material configured and/or selected to resist damaging, scratching, and/or marring a surface of firearm  10  and/or barrel  48 . Muzzle cup  178  also may be constructed of any appropriate material, such as a rigid or semi-rigid material, as well as a heat-resistant material, such as one that will not melt, or otherwise deteriorate or become damaged when in contact with a muzzle of a firearm after recent use of the firearm. In some examples, barrel sheath  170  and/or muzzle cup  178  may be configured to provide a visual indication of the presence and/or nature of firearm cover  100 . For example, elongate flexible portion  172  and/or muzzle cup  178  may include highly conspicuous indicia and/or have a highly conspicuous color, which may represent or otherwise indicate the presence and/or the nature of firearm cover  100 . As more specific examples, elongate flexible portion  172  and/or muzzle cup  178  may have a bright color, a fluorescent color, a neon color, a reflective color, and/or a color and/or indicia generally understood within the sport of firearm shooting to indicate a specific state of safety and/or inoperability of firearm  10 . 
     Turning now to  FIGS. 4-13 , illustrative, non-exclusive examples of firearm covers  100  are illustrated. Where appropriate, the reference numerals from the schematic illustrations of  FIGS. 1-2  are used to designate corresponding parts of firearm covers  100  and firearms  10  in  FIGS. 4-13 ; however, the examples of  FIGS. 4-13  are non-exclusive and do not limit firearm covers  100  or firearms  10  to the illustrated embodiments of  FIGS. 4-13 . That is, firearm covers  100  and firearms  10  are not limited to the specific embodiments illustrated in  FIGS. 4-13 , and firearm covers  100  and/or firearms  10  may incorporate any number of the various aspects, configurations, characteristics, properties, etc. that are illustrated in and discussed with reference to the schematic representations of  FIGS. 1-3  and/or the embodiments of  FIGS. 4-13 , as well as variations thereof, without requiring the inclusion of all such aspects, configurations, characteristics, properties, etc. For the purpose of brevity, each previously discussed component, part, portion, aspect, region, etc. or variants thereof may not be discussed, illustrated, and/or labeled again with respect to  FIGS. 4-13 ; however, it is within the scope of the present disclosure that the previously discussed features, variants, etc. may be utilized with any appropriate firearm cover  100  and/or firearm  10 . 
       FIG. 4  provides an illustrative, non-exclusive example of firearm cover  100  in the form of a magazine-fed semi-automatic rifle cover  101  configured to be utilized in conjunction with firearm  10  in the form of a magazine-fed semi-automatic rifle  11 , and  FIGS. 5-6  illustrate the magazine-fed semi-automatic rifle cover installed on the magazine-fed semi-automatic rifle. As illustrated in  FIGS. 4-6 , magazine-fed semi-automatic rifle cover  101  includes disabling structure  150  in the form of bolt restriction structure  152  extending from first side wall  120 , and includes restricting structure  160  in the form of first safety restriction structure  162  on the first side wall, second safety restriction structure  164  on second side wall  124 , trigger cover  166  on each of the first side wall and the second side wall, and magazine well structure  168  extending from connecting region  134 . As further illustrated in  FIGS. 4-6 , magazine-fed semi-automatic rifle cover  101  additionally includes a firearm conforming feature  184  in the form of a notch partially defined by first lip  122  configured to conform to a shell deflector positioned adjacent to ejection port  26  of magazine-fed semi-automatic rifle  11 . Thus, when receiver  20  of magazine-fed semi-automatic rifle  11  is operatively received in partially enclosed region  114  of magazine-fed semi-automatic rifle cover  101 , bolt restriction structure  152  prevents bolt  28  from closing, first safety restriction structure  162  and/or second safety restriction structure  164  restricts the magazine-fed semi-automatic rifle from being transitioned to a firing mode, trigger cover  166  restricts trigger  42  from being actuated, and magazine well structure  168  prevents a magazine of ammunition from being inserted into magazine well  40 . More specifically, safety restriction structure  162  of magazine-fed semi-automatic rifle cover  101  includes an elongate portion on one of first side wall  120  and second side wall  124  that extends rearward from an adjacent portion of the first side wall or the second side wall. 
     With reference to  FIGS. 4-6 , magazine-fed semi-automatic rifle cover  101  additionally or alternatively may be described in terms of a shape of body  110  thereof. Specifically, connecting region  134  may be described as extending forward of each of first side wall  120  and second side wall  124 , first safety restriction structure  162  may be described as extending rearward of first side wall  120 , and second safety restriction structure  164  may be described as extending rearward of second side wall  124 . Additionally, bolt restriction structure  152  may be described as extending from a portion of first side wall  120  that extends forward of a remainder of the first side wall, and/or the first side wall may be described as having a cutout partially defined by the portion of the first side wall that extends forward of the remainder of the first side wall. 
       FIG. 7  provides an illustrative, non-exclusive example of firearm cover  100  in the form of an AK-pattern cover  102  configured to be utilized in conjunction with firearm  10  in the form of an AK-pattern rifle  12  (e.g., an AK-47 or other AK-pattern rifle), and  FIGS. 8-9  illustrate the AK-pattern cover installed on an AK-pattern rifle  12 . As illustrated in  FIGS. 7-9 , AK-pattern cover  102  includes disabling structure  150  in the form of bolt restriction structure  152  extending from first side wall  120 , and includes restricting structure  160  in the form of safety restriction structure  162  on the first side wall, trigger cover  166  on each of the first side wall and second side wall  124 , and magazine well structure  168  extending from connecting region  134 . Thus, when receiver  20  of AK-pattern rifle  12  is operatively received in partially enclosed region  114  of AK-pattern cover  102 , bolt restriction structure  152  prevents the rifle&#39;s bolt from closing, safety restriction structure  162  restricts the AK-pattern rifle from being transitioned to a firing mode, trigger cover  166  restricts trigger  42  from being actuated, and magazine well structure  168  prevents a magazine of ammunition from being inserted into magazine well  40 . More specifically, safety restriction structure  162  of AK-pattern cover  102  includes an elongate portion of first side wall  120  positioned such that safety lever  36  extends through a safety lever notch  161  when receiver  20  of AK-pattern rifle  12  is operatively received in partially enclosed region  114  of AK-pattern cover  102 . 
     With reference to  FIGS. 7-9 , AK-pattern cover  102  additionally or alternatively may be described in terms of a shape of body  110  thereof. Specifically, connecting region  134  may be described as being coextensive with second side wall  124  in the fore-aft direction, and first side wall  120  may be described as extending forward of the connecting region and the second side wall. Additionally or alternatively, magazine well structure  168  may be described as extending from a forward portion of connecting region  134  that is positioned vertically above a rearward portion of the connection region, and bolt restriction structure  152  may be described as projecting from a region of first side wall  120  that is coextensive with the forward region of the connecting region and the is forward of the rearward portion of the connection region. 
       FIG. 10  provides an illustrative, non-exclusive example of firearm cover  100  in the form of a lever action rifle cover  103  installed on firearm  10  in the form of a lever action rifle  13  that includes a lever  34 . As illustrated in  FIG. 10 , lever action rifle cover  103  includes disabling structure  150  in the form of hammer restriction structure  158  defined by the first side wall, and includes restricting structure  160  in the form of trigger cover  166  on each of the first side wall and the second side wall. Thus, when receiver  20  of lever action rifle  13  is operatively received in the partially enclosed region of lever action rifle cover  103 , hammer restriction structure  158  restricts an external hammer  32  of lever action rifle  13  from being cocked or decocked, and trigger cover  166  restricts trigger  42  from being actuated. Additionally, and as illustrated in  FIG. 10 , lever action rifle cover  103  is configured to restrict lever  34  from being actuated. More specifically, lever action rifle cover  103  may be described as engaging lever  34  so as to physically impede the lever from pivoting in a downward direction, which in turn may prevent a round from being chambered. 
       FIG. 11  provides an illustrative, non-exclusive example of firearm cover  100  in the form of a bolt action rifle cover  104  installed on firearm  10  in the form of a bolt action rifle  14 . As illustrated in  FIG. 11 , bolt action rifle cover  104  includes disabling structure  150  in the form of bolt handle restriction structure  156  defined by the first side wall, and includes restricting structure  160  in the form of trigger cover  166  on each of the first side wall and the second side wall. Thus, when receiver  20  of bolt action rifle  14  is operatively received in the partially enclosed region of bolt action rifle  104 , bolt handle restriction structure  156  prevents the bolt from transitioning between an open position and a closed position, and trigger cover  166  restricts trigger  42  from being actuated. Moreover, bolt action rifle cover  104  when operatively installed on bolt action rifle  14  operatively covers safety  36 , which on some bolt action rifles is on the upper side of the stock rearward of the bolt; however, a safety  36  may be positioned in various positions on differently configured bolt action rifles and regardless of where a safety is positioned, it is within the scope of the present disclosure that a bolt action rifle cover  104  may operatively cover the safety. Accordingly, one or both of the first sidewall and the second sidewall of the bolt action rifle cover  104  may define a safety restriction structure  162 . 
       FIG. 12  provides an illustrative, non-exclusive example of firearm cover  100  in the form of a semi-automatic shotgun cover  105  installed on firearm  10  in the form of a semi-automatic shotgun  15 . As illustrated in  FIG. 12 , semi-automatic shotgun cover  105  includes disabling structure  150  in the form of bolt restriction structure  152  extending from first side wall  120  and charging handle restriction structure  154  defined by the first side wall, and includes restricting structure  160  in the form of trigger cover  166  on each of the first side wall and the second side wall. In addition, connecting region  134  of semi-automatic shotgun cover  105  covers the shell port of semi-automatic shotgun  15  and this restricts insertion of shells into the internal magazine of the semi-automatic shotgun. Accordingly, connecting region  134  of semi-automatic shotgun cover  105  may be described as defining magazine well structure  168 . Alternatively, semi-automatic shotgun cover  105  may comprise magazine well structure  168  that extends from connecting region  134  into the shell port of semi-automatic shotgun  15  when receiver  20  is operatively received in the partially enclosed region of the semi-automatic shotgun. In addition, one of the first side wall and the second side wall of semi-automatic shotgun cover  105  restricts access to the safety of the semi-automatic shotgun and thus may be described as defining a safety restriction structure  162 . Thus, when receiver  20  of semi-automatic shotgun  15  is operatively received in the partially enclosed region of semi-automatic shotgun cover  105 , bolt restriction structure  152  prevents the bolt from closing, charging handle restriction structure  154  prevents charging handle  30  from being translated in a rearward direction, trigger cover  166  restricts trigger  42  from being actuated, connecting region  134  restricts access to the shell port, and access to the safety lever is restricted. 
       FIG. 13  provides an illustrative, non-exclusive example of firearm cover  100  in the form of a pump-action shotgun cover  106  installed on firearm  10  in the form of a pump-action shotgun  16 . As illustrated in  FIG. 13 , pump-action shotgun cover  106  includes disabling structure  150  in the form of bolt restriction structure  152  extending from first side wall  120 , and includes restricting structure  160  in the form of trigger cover  166  on each of the first side wall and the second side wall. In the illustrated example, the first side wall extends only partially over ejection port  26 , and the bolt restriction structure extends only into a rear region of the rejection port. Accordingly, in such an example, a user may still visually see within the ejection port and thus be able to see if a shell is positioned within the firing chamber of the firearm even when the receiver is operatively received in the partially enclosed region of the cover  106 . An alternative configuration of a pump-action shotgun cover  106  may fully extend over the ejection port  26 . In addition, connecting region  134  of pump-action shotgun cover  106  covers the shell port of pump-action shotgun  16  and this restricts insertion of shells into the internal magazine of the pump-action shotgun. Accordingly, connecting region  134  of pump-action shotgun cover  106  may be described as defining magazine well structure  168 . Alternatively, pump-action shotgun cover  106  may comprise magazine well structure  168  that extends from connecting region  134  into the shell port of pump-action shotgun  16  when receiver  20  is operatively received in the partially enclosed region of the pump-action shotgun. In addition, one of the first side wall and the second side wall of pump-action shotgun cover  106  restricts access to the safety of the pump-action shotgun and thus may be described as defining a safety restriction structure  162 . Thus, when receiver  20  of pump-action shotgun  16  is operatively received in the partially enclosed region of pump-action shotgun cover  106 , bolt restriction structure  152  prevents the bolt from closing, trigger cover  166  restricts trigger  42  from being actuated, connecting region  134  restricts access to the shell port, and access to the safety lever is restricted. 
     Illustrative, non-exclusive examples of inventive subject matter according to the present disclosure are described in the following enumerated paragraphs: 
     A. A firearm cover, comprising: 
     a body defining a partially enclosed region sized and shaped to receive at least a portion of a firearm receiver of a firearm and configured to transition between a clamped conformation and an open conformation, wherein in the clamped conformation, the body is retained on the firearm receiver, wherein in the open conformation, the body is configured to be selectively placed over and removed from the firearm receiver, wherein the body is biased toward the clamped conformation, and wherein the body comprises:
         a first side wall having a first lip, wherein the first side wall is configured to at least partially cover a first side of the firearm receiver when the firearm receiver is operatively received in the partially enclosed region;   a second side wall opposite the first side wall and having a second lip, wherein the second side wall is configured to at least partially cover a second side of the firearm receiver when the firearm receiver is received in the partially enclosed region, wherein the first lip and the second lip define a longitudinal opening to the partially enclosed region between the first lip and the second lip, wherein the first lip and the second lip are spaced further apart in the open conformation than in the clamped conformation, wherein the first side wall and the second side wall define a forward opening to the partially enclosed region and a rear opening to the partially enclosed region, and wherein, when the firearm receiver is operatively received in the partially enclosed region, the firearm extends through the forward opening and the rear opening; and   a connecting region extending between the first side wall and the second side wall.       

     A1. The firearm cover of paragraph A, wherein the body is constructed of a semi-rigid, flexible material. 
     A1.1. The firearm cover of paragraph A1, wherein the semi-rigid flexible material has an internal bias that biases the body toward the clamped conformation. 
     A1.2. The firearm cover of any of paragraphs A1-A1.1, wherein the semi-rigid flexible material comprises a thermoplastic or an acrylic-polyvinyl chloride. 
     A2. The firearm cover of any of paragraphs A-A1.2, wherein the body is integrally biased toward the clamped conformation. 
     A3. The firearm cover of any of paragraphs A-A2, wherein the body is internally biased toward the clamped conformation. 
     A4. The firearm cover of any of paragraphs A-A3, further comprising: 
     a spring operatively coupled to the body, wherein the spring biases the body toward the clamped conformation. 
     A5. The firearm cover of any of paragraphs A-A4, further comprising a hinge operatively coupled to the connecting region of the body, wherein the hinge is configured to facilitate transition of the body between the open conformation and the clamped conformation. 
     A6. The firearm cover of any of paragraphs A-A4, wherein the connecting region comprises a hinge configured to facilitate transition of the body between the open conformation and the clamped conformation. 
     A7. The firearm cover of any of paragraphs A-A6, wherein the body is configured to be operatively placed over and removed from the firearm receiver from a lower side of the firearm receiver. 
     A8. The firearm cover of any of paragraphs A-A7, wherein the longitudinal opening is positioned adjacent an upper side of the firearm receiver when the firearm receiver is operatively received in the partially enclosed region. 
     A9. The firearm cover of any of paragraphs A-A6, wherein the body is configured to be operatively placed over and removed from the firearm receiver from an upper side of the firearm receiver. 
     A10. The firearm cover of any of paragraphs A-A6 and A9, wherein the longitudinal opening is positioned adjacent a lower side of the firearm receiver when the firearm receiver is operatively received in the partially enclosed region. 
     A11. The firearm cover of any of paragraphs A-A10, wherein the firearm receiver is positioned within the longitudinal opening when the firearm receiver is operatively received in the partially enclosed region. 
     A12. The firearm cover of any of paragraphs A-A10, wherein the longitudinal opening extends adjacent to the firearm receiver when the firearm receiver is operatively received in the partially enclosed region. 
     A13. The firearm cover of any of paragraphs A-A12, wherein the first lip extends toward the partially enclosed region relative to an adjacent portion of the first side wall. 
     A14. The firearm cover of any of paragraphs A-A13, wherein the second lip extends toward the partially enclosed region relative to an adjacent portion of the second side wall. 
     A15. The firearm cover of any of paragraphs A-A14, further comprising: 
     an upper retainer operatively coupled to one of the first side wall and the second side wall and configured to be selectively extended across the longitudinal opening and temporarily coupled to the other of the first side wall and the second side wall to restrict removal of the firearm receiver from the partially enclosed region when the firearm receiver is operatively received in the partially enclosed region. 
     A16. The firearm cover of any of paragraphs A-A15, further comprising: 
     a rear retainer operatively coupled to one of the first side wall and the second side wall and configured to be selectively extended across the rear opening and temporarily coupled to the other of the first side wall and the second side wall to restrict removal of the firearm receiver from the partially enclosed region when the firearm receiver is operatively received in the partially enclosed region. 
     A17. The firearm cover of any of paragraphs A-A16, further comprising: 
     a front retainer operatively coupled to one of the first side wall and the second side wall and configured to be selectively extended across the forward opening and temporarily coupled to the other of the first side wall and the second side wall to restrict removal of the firearm receiver from the partially enclosed region when the firearm receiver is operatively received in the partially enclosed region. 
     A18. The firearm cover of any of paragraphs A-A17, further comprising: 
     at least one disabling structure configured to physically disable the firearm and prevent it from being fired when the firearm receiver is operatively received in the partially enclosed region, wherein at least one of:
         the at least one disabling structure is defined by the body;   the at least one disabling structure is operatively coupled to the body; and   the at least one disabling structure extends from the body.       

     A18.1. The firearm cover of paragraph A18, wherein the at least one disabling structure comprises a bolt restriction structure positioned to extend within an ejection port of the firearm when a bolt of the firearm is open and prevent closure of the bolt when the firearm receiver is operatively received in the partially enclosed region. 
     A18.1.1. The firearm cover of paragraph A18.1, wherein the bolt restriction structure extends from one of the first side wall and the second side wall into the partially enclosed region. 
     A18.2. The firearm cover of any of paragraphs A18-A18.1.1, wherein the at least one disabling structure comprises a charging handle restriction structure positioned to restrict movement of a charging handle of the firearm when the firearm receiver is operatively received in the partially enclosed region. 
     A18.2.1. The firearm cover of paragraph A18.2, wherein the charging handle restriction structure is positioned to restrict rearward movement of the charging handle when the firearm receiver is operatively received in the partially enclosed region and when the charging handle is positioned in its forward position. 
     A18.2.2. The firearm cover of paragraph A18.2, wherein the charging handle restriction structure is positioned to restrict forward movement of the charging handle when the firearm receiver is operatively received in the partially enclosed region and when the charging handle is positioned in its rearward position. 
     A18.3. The firearm cover of any of paragraphs A18-A18.2.2, wherein the firearm is a bolt action rifle, and wherein the at least one disabling structure comprises a bolt handle restriction structure positioned to restrict movement of a manual bolt handle of the bolt action rifle when the firearm receiver is operatively received in the partially enclosed region. 
     A18.3.1. The firearm cover of paragraph A18.3, wherein the bolt handle restriction structure is positioned to restrict closure of a bolt of the firearm when the bolt is open and when the firearm receiver is operatively received in the partially enclosed region. 
     A18.3.2. The firearm cover of paragraph A18.3, wherein the bolt handle restriction structure is positioned to restrict opening of a bolt of the firearm when the bolt is closed and when the firearm receiver is operatively received in the partially enclosed region. 
     A18.4. The firearm cover of any of paragraphs A18-A18.3.2, wherein the at least one disabling structure comprises a hammer restriction structure positioned to restrict movement of an external hammer of the firearm when the firearm receiver is operatively received in the partially enclosed region. 
     A18.4.1. The firearm cover of paragraph A18.4, wherein the hammer restriction structure is positioned to restrict movement of the external hammer from a cocked position toward a decocked position when the firearm receiver is operatively received in the partially enclosed region. 
     A18.4.2. The firearm cover of paragraph A18.4, wherein the hammer restriction structure is positioned to restrict movement of the external hammer from a decocked position toward a cocked position when the firearm receiver is operatively received in the partially enclosed region. 
     A18.4.3. The firearm cover of paragraph A18.4, wherein the hammer restriction structure is positioned to restrict movement of the external hammer from a half-cocked position toward both a cocked position and a decocked position when the firearm receiver is operatively received in the partially enclosed region. 
     A18.4.4. The firearm cover of any of paragraphs A18.4-A18.4.3, wherein at least one of the first lip and the second lip define a hammer notch positioned to receive the hammer when the firearm receiver is operatively received in the partially enclosed region. 
     A18.4.5. The firearm cover of any of paragraphs A18.4-A18.4.3, wherein hammer restriction structure physically covers the external hammer when the firearm receiver is operatively received in the partially enclosed region. 
     A18.4.6. The firearm cover of any of paragraphs A18.4-A18.4.5, wherein the firearm is a lever action rifle. 
     A18.4.6.1. The firearm cover of paragraph A18.4.6, wherein the first side wall and the second side wall are configured to cover a lever of the lever action rifle when the firearm receiver is operatively received in the partially enclosed region. 
     A18.4.6.2. The firearm cover of any of paragraphs A18.4-A18.4.6.1, wherein the at least one disabling structure extends between a/the lever of the lever action rifle and an adjacent body of the lever action rifle and prevents the lever from completing a reloading process when the firearm receiver is operatively received in the partially enclosed region. 
     A19. The firearm cover of any of paragraphs A-A18.4.6.2, further comprising: 
     at least one restricting structure configured to physically restrict the firearm from being fired when the firearm receiver is operatively received in the partially enclosed region, wherein at least one of:
         the at least one restricting structure is defined by the body;   the at least one restricting structure is operatively coupled to the body; and   the at least one restricting structure extends from the body.       

     A19.1. The firearm cover of paragraph A19, wherein the at least one restricting structure comprises a safety restriction structure positioned to restrict movement of a safety lever of the firearm when the firearm receiver is operatively received in the partially enclosed region. 
     A19.1.1. The firearm cover of paragraph A19.1, wherein the safety restriction structure comprises an elongate portion of one of the first side wall and the second side wall that extends rearward from an adjacent portion of the one of the first side wall and the second side wall. 
     A19.1.2. The firearm cover of any of paragraphs A19.1-A19.1.1, wherein the safety restriction structure comprises a first safety restriction structure on the first side wall and a second safety restriction structure on the second side wall. 
     A19.1.3. The firearm cover of paragraph A19.1, wherein the safety restriction structure comprises a safety lever notch in one of the first side wall and the second side wall, and wherein the safety lever extends through the safety lever notch when the firearm receiver is operatively received in the partially enclosed region. 
     A19.2. The firearm cover of any of paragraphs A19-A19.1.3, wherein the at least one restricting structure comprises a magazine well structure positioned to extend within a magazine well of the firearm when the firearm receiver is operatively received in the partially enclosed region and to prevent insertion of a magazine into the magazine well. 
     A19.2.1. The firearm cover of paragraph A19.2, wherein the magazine well structure extends from the connecting region into the partially enclosed region. 
     A19.2.2. The firearm cover of paragraph A19.2, wherein the magazine well structure extends from at least one of the first side wall and the second side wall and into the partially enclosed region. 
     A19.2.3. The firearm cover of any of paragraphs A19.2-A19.2.2, wherein the firearm receiver cannot be operatively received in the partially enclosed region if the magazine is positioned within the magazine well. 
     A20. The firearm cover of any of paragraphs A-A19.2.3, wherein the first side wall and the second side wall are configured to cover a trigger and a trigger guard of the firearm to prevent access to the trigger when the firearm receiver is operatively received in the partially enclosed region. 
     A21. The firearm cover of any of paragraphs A-A20, further comprising: 
     a barrel sheath operatively coupled to the body, wherein the barrel sheath comprises:
         an elongate flexible portion operatively coupled to the body; and   a muzzle cup operatively coupled to the elongate flexible portion and defining a muzzle volume for operatively receiving a muzzle of the firearm;   wherein the elongate flexible portion is sized to extend forward of the body along a barrel of the firearm and at least partially enclose the barrel when the firearm receiver is operatively received in the partially enclosed region and when the muzzle is operatively received in the muzzle volume.       

     A21.1. The firearm cover of paragraph A21, wherein the barrel sheath is configured to be selectively uncoupled from and recoupled to the body. 
     A21.2. The firearm cover of any of paragraphs A21-A21.1, wherein the elongate flexible portion is constructed of a stretchy material, optionally a fabric material, optionally an elastic material. 
     A21.3. The firearm cover of any of paragraphs A21-A21.2, wherein the elongate flexible portion defines an upper slit that extends at least partially along an upper side of the elongate flexible portion, and wherein the upper slit is sized to permit a firearm accessory coupled to the firearm to extend through the upper slit. 
     A21.3.1. The firearm cover of paragraph A21.3, wherein the firearm accessory comprises one or more of a scope, a sight, and a light. 
     A21.4. The firearm cover of any of paragraphs A21-A21.3.1, wherein the muzzle cup is constructed of a rigid or semi-rigid material. 
     A21.5. The firearm cover of any of paragraphs A21-A21.4, wherein the muzzle cup is constructed of a heat-resistant material. 
     A22. The firearm cover of any of paragraphs A-A21.5, wherein the body comprises an outer surface positioned opposite the partially enclosed region, and wherein the outer surface comprises highly conspicuous indicia. 
     A22.1. The firearm cover of paragraph A22, wherein the highly conspicuous indicia represents at least one disabling structure. 
     A23. The firearm cover of any of paragraphs A-A22.1, wherein the body comprises an/the outer surface positioned opposite the partially enclosed region, and wherein the outer surface has a highly conspicuous color. 
     A23.1. The firearm cover of paragraph A23, wherein the highly conspicuous color represents at least one disabling structure. 
     A24. The firearm cover of any of paragraphs A-A23.1, wherein the body only partially encloses the firearm receiver when the firearm receiver is operatively received in the partially enclosed region. 
     A25. The firearm cover of any of paragraphs A-A24, wherein the firearm cover encloses at most 90% of the firearm receiver when the firearm receiver is operatively received in the partially enclosed region. 
     A26. The firearm cover of any of paragraphs A-A25, wherein the firearm cover does not extend over a/the barrel of the firearm when the firearm receiver is operatively received in the partially enclosed region. 
     A27. The firearm cover of any of paragraphs A-A26, wherein the firearm cover does not extend over a stock of the firearm when the firearm receiver is operatively received in the partially enclosed region. 
     A28. The firearm cover of any of paragraphs A-A27, wherein the firearm cover is free of an external structure for operatively retaining the firearm on an article of clothing. 
     A29. The firearm cover of any of paragraphs A-A28, wherein the firearm cover is free of a belt clip. 
     A30. The firearm cover of any of paragraphs A-A29, wherein the body is shaped to conform to an outer surface of the firearm receiver when the firearm receiver is operatively received in the partially enclosed region. 
     A31. The firearm cover of any of paragraphs A-A30, wherein the firearm is one of an AR-pattern rifle, a magazine-fed rifle, a magazine-fed semi-automatic rifle, an AK-pattern rifle, a semi-automatic rifle, an automatic rifle, a long rifle, a hunting rifle, a bolt action rifle, a lever action rifle, a shotgun, a pump-action shotgun, a semi-automatic shotgun, a black powder rifle, and a muzzle-loader rifle. 
     A32. The firearm cover of any of paragraphs A-A31, wherein the body comprises a soft inner liner facing the partially enclosed region. 
     A32.1. The firearm cover of paragraph A32, wherein the soft inner liner is constructed of one or more of a fabric material, felt material, or leather. 
     A33. The firearm cover of any of paragraphs A-A32.1, further comprising the firearm, wherein the firearm receiver is operatively received in the partially enclosed region. 
     A34. A method of restricting firing of a firearm, the method comprising: 
     providing the firearm cover of any of paragraphs A-A33; and 
     operatively positioning the firearm receiver in the partially enclosed region. 
     A34.1. The method of paragraph A34, wherein the operatively positioning disables the firearm. 
     A35. The use of the firearm cover of any of paragraphs A-A33 to restrict the firearm from being fired. 
     A36. The use of the firearm cover of any of paragraphs A-A33 to conspicuously restrict the firearm from being fired. 
     A37. The use of the firearm cover of any of paragraphs A-A33 to disable the firearm. 
     A38. The use of the firearm cover of any of paragraphs A-A33 to conspicuously disable the firearm. 
     As used herein, the terms “adapted” and “configured” mean that the element, component, or other subject matter is designed and/or intended to perform a given function. Thus, the use of the terms “adapted” and “configured” should not be construed to mean that a given element, component, or other subject matter is simply “capable of” performing a given function but that the element, component, and/or other subject matter is specifically selected, created, implemented, utilized, programmed, and/or designed for the purpose of performing the function. It is also within the scope of the present disclosure that elements, components, and/or other recited subject matter that is recited as being adapted to perform a particular function may additionally or alternatively be described as being configured to perform that function, and vice versa. Similarly, subject matter that is recited as being configured to perform a particular function may additionally or alternatively be described as being operative to perform that function. 
     The various disclosed elements of apparatuses and steps of methods disclosed herein are not required to all apparatuses and methods according to the present disclosure, and the present disclosure includes all novel and non-obvious combinations and subcombinations of the various elements and steps disclosed herein. Moreover, one or more of the various elements and steps disclosed herein may define independent inventive subject matter that is separate and apart from the whole of a disclosed apparatus or method. Accordingly, such inventive subject matter is not required to be associated with the specific apparatuses and methods that are expressly disclosed herein, and such inventive subject matter may find utility in apparatuses and/or methods that are not expressly disclosed herein.