Abstract: One example control element for controlling a breechblock stop lever that can move about a first axis of rotation, which can be moved between a standby position for releasing a breechblock carrier and a retaining position for retaining the breechblock carrier, includes a first arm (15) that can rotate about a second axis of rotation (B), a first control section on the first arm, the first control section including a first contact surface (11a) and a second contact surface (11b) facing away from the first contact surface (11a), which can be rotated about the second axis of rotation (B) for the control element (10) by a control curve (36, 37, 38) on the breechblock carrier (30); and a second control section (13) on the first arm, wherein the second control section can be controlled by a control surface (55a) on a trigger (50). Other examples are possible.

Abstract: One example control element for controlling a breechblock stop lever that can move about a first axis of rotation, which can be moved between a standby position for releasing a breechblock carrier and a retaining position for retaining the breechblock carrier, includes a first arm (15) that can rotate about a second axis of rotation (B), a first control section on the first arm, the first control section including a first contact surface (11a) and a second contact surface (11b) facing away from the first contact surface (11a), which can be rotated about the second axis of rotation (B) for the control element (10) by a control curve (36, 37, 38) on the breechblock carrier (30); and a second control section (13) on the first arm, wherein the second control section can be controlled by a control surface (55a) on a trigger (50). Other examples are possible.

Abstract: A firearm gas piston system provides tool-less removal and adjustment of gas flow along a nonlinear gradient and directs exhaust discharge away from the operator. The system includes a gas block with gas channels for directing exhaust gas away from an operator and a gas plug bore configured to accommodate insertion of a gas plug. The gas plug can include an actuator for rotating the gas plug, a key that fits within a key notch and key channel inside the gas plug bore to secure the gas plug within the bore, and a regulator portion to control the flow of discharge gas from a firearm barrel. The regulator portion includes a passage with two opening segments that accept discharge gas from the barrel and direct the gas through another opening disposed in a regulator cutout and to a piston portion of the gas block.

Abstract: Linear trigger mechanisms for firearms include a trigger slide mounted on, and configured to move linearly in relation to a chassis; and a hammer. The trigger slide has a rolling element, such as a pin-mounted roller or a rolling pin, that engages a contact surface on the hammer and thereby restrains the hammer against its spring bias. When the user pulls the trigger to discharge the firearm, the trigger slide moves linearly, causing the rolling element to roll off of the contact surface and thereby release the hammer. The trigger mechanisms can be equipped with a drop safety that rotates in response to an impact between the firearm and the ground, so as to interfere with the movement of the trigger slide and prevent the release of the hammer.

Abstract: Apparatuses are provided that include a rifle stock. For example, in one embodiment the stock includes an upper portion. The upper portion includes a proximal end and a distal end. A front portion and a rear portion are connected to the proximal end and the distal end of the upper portion, respectively. A bottom portion is connected to the front portion and rear portion. A first sidewall and a second sidewall are connected to the upper portion, the front portion, the rear portion, and the bottom portion. A channel is provided between the first and second sidewall. The upper portion, the front portion, the rear portion, and the bottom portion further define the channel. The first and second sidewalls include openings for accessing a computer device residing in the channel.

Abstract: A box magazine (10) has a body portion 11 formed from a first section (12) including a side (14) and spaced-apart, upstanding edges (16) and (18) and a second section (20) that has a side (22) and spaced-apart, upstanding rims (24) and (26). A “Z” shaped keys (28) are formed in each of the spaced-apart, upstanding edges (16) and (18) and matching “Z: shaped keyways (30) are formed in each of the spaced-apart, upstanding rims (24) and (26). The keys (28) and keyways (30) engage one another via a sliding action to form the body portion (11). A follower (32) is positioned between the first section (12) and the second section (20), a follower spring (34) is positioned between the first section (12) and the second section (20) and has a first end (36) in contact with the follower (32) and a second end (38) in contact with a floor plate (40) that seals a bottom (42) of the body portion (11) to form the box magazine (10).

Abstract: A firearm having a gas piston system includes a bolt carrier, an adjustable gas piston block located forward on the firearm and an over-the-barrel spring and guide rod arrangement, all of which is housed and contained in a top rail that runs the length of the firearm and that maintains the alignment of these firearm components. The firearm further includes components that provide full auto firing capability. These components include a specially designed auto bracket that cooperates with a modified bolt carrier and a modified upper receiver.

Abstract: A firearm having a gas piston system includes a bolt carrier, an adjustable gas piston block located forward on the firearm and an over-the-barrel spring and guide rod arrangement, all of which is housed and contained in a top rail that runs the length of the firearm and that maintains the alignment of these firearm components. The firearm further includes components that provide full auto firing capability. These components include a specially designed auto bracket that cooperates with a modified bolt carrier and a modified upper receiver.

Abstract: A bump stock and interface system for a semi-automatic firearm. The interface system includes first and second bearing elements. A handle is provided with an integral finger rest. The finger rest is concave to form a cradle for the user's trigger finger. In use, the user grasps the handle with one hand and places an index finger of the same hand firmly on the finger rest. When intending to fire a round of ammunition, the user pushes the receiver forward with their other hand so that the trigger collides with the stabilized finger. Recoil force quickly separates the trigger from the user's finger on the finger rest. The user again pushes forward the receiver to repeat the firing cycle. A lock can be selectively engaged to restrict longitudinal movement of the firearm relative to the handle, thereby returning the firearm to normal semi-automatic functionality.

Abstract: A handle (20) for rapidly firing a semi-automatic firearm (22) having a trigger (24). The handle (20) includes a grip portion (52) defining a channel (54). A block (60) that is connected to the firearm (22) is slidably disposed in the channel (54) for allowing longitudinal movement of the firearm (22) relative to the handle (20). The handle (20) also includes a trigger guard (66) disposed on one side of the trigger (24) and extending longitudinally forward of the trigger (24) by a predetermined distance (D) to an open end. The trigger guard (66) presents a finger rest (70) for placing a trigger finger (74) on the trigger guard (66). The trigger guard (66) restricts access to the trigger (24) until the firearm (22) is moved longitudinally forward by the predetermined distance (D) relative to the handle (20).

Abstract: A trigger assembly for a trigger housing for a, M249 fully automatic rifle is provided having a switch accessible at the outside of the trigger housing for changing the firing of the rifle between semi-automatic and fully-automatic fire.

Abstract: A trigger assembly for a trigger housing for a, M60 fully automatic rifle is provided having a switch accessible at the outside of the trigger housing for changing the firing of the rifle between semi-automatic and fully-automatic fire.

Abstract: A reciprocating stock and interface system for a semi-automatic firearm. The interface system includes first and second bearing elements. A handle is provided with an integral finger rest. The finger rest is concave to form a cradle for the user's trigger finger. In use, the user grasps the handle with one hand and places an index finger of the same hand firmly on the finger rest. When intending to fire a round of ammunition, the user pushes the receiver forward with their other hand so that the trigger collides with the stabilized finger. Recoil force quickly separates the trigger from the user's finger on the finger rest. The user again pushes forward the receiver to repeat the firing cycle. A lock can be selectively engaged to restrict longitudinal movement of the firearm relative to the handle, thereby returning the firearm to normal semi-automatic functionality.

Abstract: A method for rapidly firing a semi-automatic firing unit having a trigger, a receiver and a barrel. The firing unit is placed in a handle so as to enable only reciprocating linear movement along a constrained linear path that is parallel to the barrel. The user grasps the handle and places their trigger finger firmly on a finger rest. In use, the user generates a forward activation force that urges the firing unit forwardly so that the trigger collides with the stabilized finger, stimulating the first round of ammunition in the receiver. A recoil force from the discharging ammunition pushes the firing unit rearwardly so that the trigger separates from the stabilized finger. During the recoil event, the user may apply negative resistance to the translating firing unit which may be varied by the user on-the-fly to proportionally change the firing tempo.

Abstract: A bump stock and interface system for a semi-automatic firearm. The interface system includes first and second bearing elements. A handle is provided with an integral finger rest. The bearing elements are configured to wholly disengage and re-engage from the handle via a straight linear disconnecting motion. In use, the user grasps the handle with one hand and places an index finger of the same hand firmly on the finger rest. When intending to fire a round of ammunition, the user pushes the receiver forward with their other hand so that the trigger collides with the finger. Recoil force quickly separates the trigger from the user's finger on the finger rest. The user again pushes forward the receiver to repeat the firing cycle. A lock can be selectively engaged to prevent longitudinal movement of the firearm relative to the handle, thereby returning the firearm to normal semi-automatic functionality.

Abstract: A fire control selector for an automatic firearm capable of automatic or semiautomatic fire is provided. The firearm has a receiver having a moveable hammer. The selector is rotatably mounted in the receiver. A first sear is rotatably mounted in the receiver to engage the hammer where the first sear contacts a first camming surface of the selector. A second sear is rotatably mounted in the receiver to engage the hammer where the second sear contacts a second camming surface of the selector. A disconnect is rotatably mounted in the receiver where the disconnect contacts a third camming surface of the selector. The selector has a number of selectable positions.

Abstract: Automatic firearm with firing mode selector (6) to change the firing mode from automatic firing mode to semi-automatic firing mode, where the firearm (1) is equipped with a firing mechanism (11) with selection control (37) which enables the firearm (1) to function in closed bolt firing mode or open bolt firing mode, and in automatic firing mode as well as semi-automatic firing mode in both closed and open bolt firing mode.

Abstract: A method for rapidly firing a semi-automatic firing unit having a trigger, a receiver and a barrel. The firing unit is placed in a handle so as to enable only reciprocating linear movement along a constrained linear path that is parallel to the barrel. The user grasps the handle and places their trigger finger firmly on a finger rest. In use, the user generates a forward activation force that urges the firing unit forwardly so that the trigger collides with the stabilized finger, stimulating the first round of ammunition in the receiver. A recoil force from the discharging ammunition pushes the firing unit rearwardly so that the trigger separates from the stabilized finger. During the recoil event, the user may apply negative resistance to the translating firing unit which may be varied by the user on-the-fly to proportionally change the firing tempo.

Abstract: A handle assembly and combined interface system for use with a semi-automatic firearm to facilitate controlled bump firing methods. The handle assembly includes a finger rest for the user's trigger finger. The interface system is attached to a receiver of the firearm, and is slideably disposed in the handle assembly for reciprocation. In use, the user pushes a firing unit portion forward with an opposite hand so that its trigger collides with the user's finger, thus stimulating a round of ammunition. Recoil forces the firing unit rearwardly so that the trigger separates from the finger. The user then applies another forward activation force that urges the firing unit forwardly again to repeat the cycle for as long as the user chooses. A lock can be selectively engaged to restrict longitudinal movement of the firearm relative to the handle, thereby returning the firearm to normal semi-automatic functionality.

Abstract: A method for rapidly firing a semi-automatic firing unit (22) having a trigger (24), a receiver (21) and a barrel (23). The firing unit (22) is placed in a handle (20) so as to enable only reciprocating linear movement along a constrained linear path (P). The user grasps the handle (20) and places their trigger finger (74) firmly on a finger rest (70). In use, the user generates a forward activation force (200) that urges the firing unit (22) forwardly so that the trigger (24) collides with the stabilized finger (74), stimulating the first round of ammunition in the receiver (21). A recoil force (202) from the discharging ammunition pushes the firing unit (22) rearwardly so that the trigger (24) separates from the stabilized finger (74). The intensity of the forward activation force (200) can be varied by the user on-the-fly to proportionally change the firing tempo.

Abstract: A trigger system for a firearm has an enclosure having a bottom surface, a trigger pivoted at a first pivot axis within the enclosure, a firing hammer pivoted at a second pivot axis within the enclosure, the firing hammer spring-loaded to rotate clockwise to fire, the firing hammer having a first notch, a disconnector pivoted at the first pivot axis, the disconnector rocker having a hook for engaging the first notch in the firing hammer preventing firing while engaged, and a full auto rocker pivoted at a third pivot axis through the trigger, the full auto rocker having a first portion extending downward and forward from the third pivot axis and a second portion extending rearward from the third pivot axis, a part of the second portion overlying a contact point on the disconnector to the rear of the first pivot axis.

Abstract: A trigger assembly for a trigger housing for an M240 Assault Rifle is provided having a switch accessible at the outside of the trigger housing for changing the firing of the rifle between semi-automatic and fully-automatic fire.

Abstract: A gas-operated firearm has a barrel defining a bore with a gas block defining a chamber communicating with the bore via a gas passage. A gas regulation element has a first position and a second position, and serves to provide different gas flow characteristics in the different positions. The latch element gives the user audible or tactile feedback upon installation of an accessory device when the gas regulation element is a correct position suited to use of the accessory, and not when in the other position unsuited to accessory usage. The accessory may be a sound suppressor, and the latch may serve to secure the gas regulation element against position change. The latch may engage a circular array of elements on the rear face of the suppressor, and may have an angled cam face to provide ratcheting engagement for installation, and to resist removal or loosening without deliberate actuation of the latch.

Abstract: A breech device of a hand firearm comprises a firearm casing, a trigger mechanism, a carrier slidably arranged within the firearm casing, and a breech block engaging the carrier and having a firing pin. The breech device further includes a tensioning element slidably engaged with the carrier and coupled to at least one follower pin engaging the firing pin and slidably engaged with the breech block. The tensioning element includes a projecting part having a forward-directed nose adapted to engage a stop detent on the trigger mechanism. The breech device further includes a tensioning pin slidably engaged with the carrier and the breech block.

Abstract: A firearm has a frame with a barrel connected to the frame and defining a barrel axis. The barrel has a rear end defining a chamber, and a bolt assembly reciprocates with respect to the chamber between a closed position adjacent the chamber, and an open position away from the chamber. A fire control assembly includes a trigger and a selector switch with a semi-automatic position and a fully-automatic position. The fire control assembly includes a bolt assembly sear operably engaging the bolt. The fire control assembly operates when the selector switch is in the semi-automatic position in response to pulling the trigger to discharge the firearm, to load a cartridge, and to position the bolt in the closed position. The fire control assembly operates when the selector switch is in the fully-automatic position in response to pulling the trigger to discharge the firearm, and to hold the bolt in the open position.

Abstract: Automatic firearm with firing mode selector (6) to change the firing mode from automatic firing mode to semi-automatic firing mode, wherein the firearm (1) is equipped with a firing mechanism (11) with selection control (37) which enables the firearm (1) to function in closed bolt firing mode or open bolt firing mode, and in automatic firing mode as well as semi-automatic firing mode.

Abstract: In an automatic rifle which has been converted for non-military purposes to be semi-automatic by the removal of parts that allow its automatic function, additional suppressing elements are provided to ensure that the interruptor remains depressed until the bolt carrier fully passes the striker catch before the striker catch is engaged by the interruptor. This prevents premature connection of the striker catch and the interruptor, which could prevent sufficient striker spring pressure so that the next round can be fired. In one embodiment the trigger mechanism is fitted with an additional suppressing element (10) formed as a side push plate 7 on the bridge (6) of bolt carrier (5).

Abstract: A two-stage trigger assembly for the M16 or AR15 weapon systems. The trigger assembly comprises a spring loaded hammer, trigger and disconnector. Calibrated springs are provided to facilitate the adjustment of the second stage trigger pull weight. No set screws adjustments are necessary and a secondary safety sear similar to the factory original fire control components has been incorporated to prevent the unintentional mechanical discharge of the firearm. Installation of the disclosed device is identical to the factory fire control group and requires no hand fitting.

Abstract: A fire control mechanism provides semi-automatic, burst, fully automatic, and safe modes for a firearm. The fire control mechanism includes first, second and third shafts. A hammer is rotatably mounted on the first shaft and biased for rotation about the first shaft in a first direction. An auto sear is mounted on the second shaft and engageable with the hammer. A semi disconnect is mounted on the second shaft and engageable with the hammer. A primary sear is mounted on the third shaft and engageable with the hammer.

Abstract: A dual stage trigger assembly for a firearm. The trigger assembly comprises a spring loaded lightweight hammer, a spring loaded trigger, a spring loaded disconnector, a spring follower for the disconnector spring and two adjustment screws that allow the user the ability to adjust the sear face of the trigger that is engaged with the hammer in the cocked position and adjust the force imparted to the disconnector by the disconnector spring.

Abstract: An automatic weapon has a housing 1 with a movable spring-mounted barrel assembly 6 having a barrel 7 and a receiver 8. The receiver 8 has a spring-mounted bolt support 24 with a bolt 27, a buffer mechanism 32 and a firing pin mechanism 33 having a movable firing hammer 36 which interacts with the bolt support 24. The housing 1 has a trigger mechanism 50 with a firing trigger 52, a sear 43 with a spring-mounted pawl 18 interacting with the trigger 52 and the firing hammer 36, and a movable tripper 53 with cams (56, 67) interacting with the spring-mounted pawl 48 and the trigger 52. A device angularly displaces the barrel assembly 6 relative to the housing 1 and a muzzle attachment device 13 has expanding chambers with intercrossing cavities.

Abstract: A fully automatic self-loading weapon is disclosed. The weapon has a functional part that can be moved by the release of a round, and a connectable and disconnectable single-shot device which, when activated, causes release of one shot for every actuation of the weapon trigger. To restrict the number of rounds of a burst to only two rounds, after release of one round with the single-shot device disconnected, the movement of the functional part automatically activates the single-shot device so that only a single additional round is released.

Abstract: A continuous shooting device (22) which is able to be detachably mounted on a real gun or a toy gun having a gun frame (10), a single shot trigger (17) for shooting said gun each time said trigger is depressed, and a slide (13) which is moved first rearward and then forward upon each shooting for supplying a bullet, said continuous shooting device comprises a mounting unit (23) detachably mounted on said gun frame, and a continuous shooting trigger (34) being installed on said mounting unit and movable back and forth, said continuous shooting device is able to make a continuous shooting operation as long as said continuous shooting trigger being depressed.

Abstract: A firearm with a trigger, a hammer, an automatic sear, and a selector switch connected to a rotatable firing control cam for selecting among types of firing selections of the firearm. The types of firing selections include safe, semi-automatic, limited automatic burst, and fully automatic. The control cam has a section with a general cross-sectional mushroom shape that is contacted by a leg from the automatic sear. The leg has a bend and extends under a center of the control cam in at least two positions of the control cam.

Abstract: A fire selector system for selecting between automatic and semi-automatic operation of a gun is provided. The system is mountable on a reciprocating slide of the gun and into operative relationship with the trigger bar of the gun. A member of the selector system is movable between forward and rearward longitudinal positions. The forward longitudinal position allows the member to assume an activating longitudinal position for automatic operation of the gun. The rearward longitudinal position prevents the member from assuming its activating longitudinal position, thereby effecting semi-automatic operation of the gun. The member repetitively contacts a contact area of the trigger bar as it reciprocates with a reciprocating slide of the gun during automatic operation. Further, the device is easily installed and removed from the reciprocating slide depending on user requirements.

Abstract: A hand-held automatic firearm comprises a trigger mechanism, which includes a hammer, arranged to be cocked as the breechblock recoils, a sustained-fire lever, controlled by the breechblock and locks the hammer as the breechblock advances, a trigger slider, movable by the trigger against spring force from an initial position to a single-shot position and further to a sustained-fire position, and a pair of mutually cooperating levers, which respectively constitute a release member and a disconnector member and are adapted each to enter the path of movement of a hammer extension and to assume a position that depends on the position of the trigger slider. The release lever and the disconnector lever are pivoted on a common upright pivot and have respective confronting camming side edges, which define between them a cam slot. A camming member is movable by the trigger slider and extends into said cam slot.

Abstract: A projectile firing weapon is disclosed having a simplified construction and a consequent increase in reliability. The trigger and firing mechanism are completely contained within an easily removable and replaceable cassette which may simply be dropped into a cavity in the weapon's stock. The entire barrel assembly may be attached to the stock by a single bolt and a pivoting attachment. The pivoting attachment allows the ready replacement of the barrel assembly or the ready replacement of the firing mechanism actuator cassette should either of them malfunction. The stock and hand grip may be formed of a single piece to further simplify the construction of the weapon.

Abstract: A machinegun pistol is described, which can be reliably switched between semi and full automatic modes by an operator holding the gun in a natural two-hand grip. The gun includes a bolt (20, FIG. 1) and a firing pin device 22 that each slide longitudinally, a trigger assembly with a primary sear (28) that is depressed by the trigger for semiautomatic operation, and an auto control member (34) that can be depressed to switch to full automatic operation. When the control member is depressed, it connects a secondary sear (36) with the primary sear. The bolt carries a cam (40) that can depress the secondary sear (36) when the bolt moves forward, to thereby repeatedly depress the primary sear (28) when the two sears are connected during automatic operation. The control member (34) is operated by depressing it into the frame, to avoid errors in the heat of battle. The depressable control member (34, FIG.

Abstract: A hammer mechanism for an automatic gun has a hammer 742 connected to rotate about a pivot rod 741 and the hammer has a firing pin striking surface 743. A strut 750 is connected by a pivot 752 to the remote side of the firing pin striking surface 743 from the hammer pivot 741 and the opposing end of the strut 750 from the hammer is spring biassed to rotate the hammer toward a firing position. The top surface of the strut 753 is arranged to be tangential to a top surface on the hammer defining a radius 744 so as to enable a block 300 of the bolt carrier assembly 3 to ride completely rearwardly of the hammer and not to foul thereupon on its forward portion of the bolt operating cycle.

Abstract: A machine gun pistol is described, which can be reliably switched between semi and full automatic modes by an operator holding the gun in a natural two-hand grip. The gun includes a bolt (20, FIG. 1) and a firing pin device (22) that each slide longitudinally, a trigger assembly with a primary sear (28) that is depressed by the trigger for semiautomatic operation, and an auto control member (34) that can be depressed to switch to full automatic operation. When the control member is depressed, it connects a secondary sear (36) with the primary sear. The bolt carries a cam (40) that depresses the secondary sear (36) every time the bolt moves forward, to thereby repeatedly depress the primary sear (28) when the two sears are connected during automatic operation. The control member (34) is operated by depressing it into the frame, to avoid errors in the heat of battle. The depressable control member (34, FIG.

Abstract: The breech of a gun moves in opposite, recoil and counter-recoil directions along a guide path. A rotatable coupling member having a first interlocking end is mounted along the fixed structure of the gun. The gun is selectively activated by a rotatable key member aligned with the coupling member, the key member having a second interlocking end adapted to interfit with the first interlocking end on the coupling member. The key member can be axially slid with respect to the coupling member to assume an on-position when it is disengaged from the coupling member, an off-position when it is drivingly engaged with the coupling member, and an intermediate position when only the end surfaces of the interlocking ends of the coupling member and key member are in engagement. Release of the mechanism from the on-position induces the key member to move into the intermediate position, and the counter-recoil motion of the breech induces the key member to move from its intermediate position into its off-position.

Abstract: A trigger mechanism for submachine guns and other automatic weapons, having a spring loaded burst finger incorporated into a standard trigger, so that the burst finger bears against the sear in such a way that when the trigger is squeezed the burst finger bears against the sear, turning the sear, and disengaging the sear from the bolt and the trigger to automatically overtravel, blocking the sear from re-engaging the bolt. Trigger rebound repositions the trigger allowing the sear to re-engage the bolt after a short burst of rounds has been fired; then the firer consciously releases the trigger and the trigger returns to its non-firing position. Otherwise full and continued depression of the trigger compels the sear to remain disengaged from the bolt producing a fully automatic firing.

Abstract: 1.