Abstract: A slide block mechanism for a semi-automatic pistol that locks the slide in battery and prevents the slide from reciprocating when the pistol is discharged. The slide block mechanism consists of a pair of aligned notches formed in the bottom edge of the slide and the top of the frame, and a pivoting slide block lever mounted to the frame that selectively seats within either of the aligned notches. The slide block lever can be manually switched to engage and disengage the slide block mechanism and is independent of the fire control and slide stop assemblies. The slide block lever has a protrusion that seats within the slide notch when engaged to prevent the slide from moving rearward and seats within the frame notch when disengaged for allowing normal operation of the slide.

Abstract: A rifle stock assembly adapted to receive and support a bolt action rifle barreled receiver is disclosed. The assembly includes a rifle stock/chassis having an elongated recess and a cage removably fastened to the chassis in the recess to receive a bolt action rifle receiver therein. The assembly may also have a pair of magazine collets fastened to the bottom of the forward portion of the chassis defining a magazine well beneath the cage. Cages having different internal surface shapes may be utilized to accommodate different barreled receivers in the same rifle stock/chassis. Different magazine collets may also be utilized to accommodate different caliber magazines used with the different barreled receivers.

Abstract: An improved firearm bolt catch assembly for the lower receiver of a firearm, the assembly having a lift arm that retains the bolt of the firearm in a retracted position after the cartridge magazine has been emptied, such that the firearm does not need to be re-racked when an empty magazine is removed and replaced with a full magazine. The lift arm is substantially C-shaped, having an elongated middle segment and a pair of transverse legs. Each of the transverse legs is pivotally mounted onto the lower receiver. The lift arm is raised by the magazine follower when the last cartridge has been discharged. An insert assembly is also disclosed.

Abstract: A firearm magazine assisted release device is provided. The release device comprises a spring secured with or integrated into a firearm. The spring is biased when a magazine is locked into a firearm, such that when the magazine release button is pressed stored potential energy is released as expansive kinetic energy, ejecting the magazine from the firearm.

Abstract: A rotational safety device for a firearm is provided that replaces a traditional cross bar safety device. The safety device is easier to operate and easier for a firearm user to assess whether the firearm can be fired than previous safety systems. The safety device of the present technology involves setting a safety to “fire” or to a no fire or “safety on” position by causing a safety member installed within a trigger mechanism to rotate about an axis. The safety device may include a recessed portion that may be rotationally positioned to face a trigger to allow the trigger to be completely depressed. The safety device may also include one or more locking positions in a range of rotation, physical limits on the range of rotation such as pins that engage surfaces of a firearm, and may be used with a variety devices to provide rotation.

Abstract: A barrel assembly for use in a semiautomatic firearm, including a barrel and a takedown lever. A rear portion of the barrel includes a follower lug and a rear lug extending from an underside of the rear portion. The follower lug further includes a follower notch. A pin of the takedown lever includes a notch with a vertical face configured to contact a vertical face of the follower notch when the firearm is in the locked position. The rear lug is configured to be supported by a portion of a locking block of the firearm prior to firing and during a portion of the recoil period. The modifications to the barrel assembly result in increased dwell time and accuracy of the firearm.

Abstract: For use on a firearm having a removable ammunition magazine, a longitudinally reciprocating bolt, and a pivoting bolt catch member, the present invention provides an empty ammunition magazine bolt hold open mechanism having a longitudinally extending axel pivotally mounted to the firearm for rotation about a longitudinal axis. The axel has a forward lever arm that extends transversely from the axis and is positioned to be engaged by a magazine follower when the magazine is empty of ammunition. Displacement of the forward lever arm causes rotation of the axel. The axel has a rear portion configured to engage the bolt catch and cause pivotal movement of the bolt catch member when the axel is rotated.

Abstract: The invention relates to a firearm comprising a housing (1), a magazine (2) for cartridges (3) which are preloaded in the direction of a transfer opening by means of a magazine feeder (7), a lock (8) which can be moved relative to the housing (1) in order to convey the cartridges (3), and a lock catch lever (4) which holds the lock (8) in a rear position when the magazine (2) is empty. A trigger element (9) is provided for automatically releasing the lock (8) into the front position when a loaded magazine (2) is inserted. An engagement surface (10) of the trigger element (9) protrudes into the movement path of a control surface (11) of the magazine (2) in a front starting position. The trigger element (9) is coupled to the lock (8) in a kinematic manner via an effective surface (12) at least during a part of the movement when moving from the front starting position into a rear end position.

Abstract: A rifle stock assembly adapted to receive and support a bolt action rifle barreled receiver is disclosed. The assembly includes a rifle stock/chassis having an elongated recess and a cage removably fastened to the chassis in the recess to receive a bolt action rifle receiver therein. The assembly may also have a pair of magazine collets fastened to the bottom of the forward portion of the chassis defining a magazine well beneath the cage. Cages having different internal surface shapes may be utilized to accommodate different barreled receivers in the same rifle stock/chassis. Different magazine collets may also be utilized to accommodate different caliber magazines used with the different barreled receivers.

Abstract: A handgun includes a locking mechanism disposed within a thickness of a grip, the locking mechanism being configured to engage with a lever associated with a slider and a magazine carried within a cavity formed by the grip; and a spring-loaded lock pivotally attached to the frame and configured to engage with a lip on a side surface of the slider, the spring-loaded lock being configured to secure the slide in a fixed position when engaged with the lip. A method includes disengaging the magazine after all bullets therein are used via the locking mechanism; and releasing the slide as the new loaded magazine is placed in the cavity of the grip via the spring-loaded lock.

Abstract: A firearm magazine assisted release device is provided. The release device comprises an external spring and method of securing that spring to the magazine. The spring is biased when the magazine is locked into a firearm, such that when the magazine release button is pressed stored potential energy is released as expansive kinetic energy, ejecting the magazine from the firearm.

Abstract: An improved M1911 pistol, method of making an improved M1911 pistol, and system for improving performance of an M1911 pistol. Replacement parts for the M1911 pistol include stainless steel, which may be a 17-4Ph metal. Improved replacement parts include an improved frame and an improved slide.

Abstract: A rifle is provided. The rifle comprises a barrel, a handguard partly axially surrounding the barrel, and a modular accessory system. The modular accessory system comprises a housing and a modular accessory support system positioned within the housing, wherein the support system includes at least two modular accessory slots. The modular accessory system also comprises a modular accessory removably secured and individually adjustable within each slot. The housing partly axially surrounds the barrel and is positioned axially adjacent to the handguard such that a combination of the handguard and the housing surrounds the barrel completely in an axial manner. Support system configurations of preferably either tray-type or platform-type may be contemplated. The modular accessory system may further comprise a common power source and a display system. A modular accessory system for rifles capable of exchangeably mounting accessories thereto in plug-and-play fashion is therefore achieved.

Abstract: An air gun includes a compression tube defining a compression chamber. A gas spring assembly is disposed within the compression chamber, and includes a piston that defines an interior pressure chamber. The piston includes a latch bushing that is disposed adjacent a rearward end of the bushing. The latch bushing defines a central bore that extends along and is concentric with a longitudinal axis of the piston. A guide rod is slideably supported within the central bore of the latch bushing. The piston is axially moveable along the longitudinal axis relative to the guide rod, between a compressed position and an un-compressed position. The guide rod includes a first end that engages the trigger assembly in abutting engagement, and a second end that is disposed within the interior pressure chamber of the piston. The latch bushing includes a ledge for engaging a sear of the trigger assembly in latching engagement.

Abstract: A bolt hold open (BHOA) catch assembly configured for operating with rimfire ammunition for use with a firearm including a receiver with an exposed receiving chamber. A BHOA housing is supported upon the lower receiver in communication with a receiver chamber in communication with a bolt assembly. A catch is supported in elevatable fashion relative to an end of the actuator housing and an end most and downward extending structural portion of the elevatable catch is capable of being manipulated by an externally configured and toggled bolt catch so that an inner pivoting end portion thereof engages the structural portion to raise the BHOA supported catch into contact with a forwardly traveling bolt, such as upon release of a previously retracted charging handle. The BHOA catch can alternatively be actuated upwardly by a suitably configured follower associated with an attachable and cartridge holding magazine, this again following a last shot hold open protocol.

Abstract: A pistol thumb safety that is capable of being coupled to a frame of a pistol, the thumb safety including a safety body adapted to be movably mounted to the frame so that the body is movable between firing and safe positions. The safety body includes an outer side surface, an inner side surface, and a top portion. A blocking feature is formed along the top portion of the safety body, wherein the blocking portion engages the slide of the pistol when the safety body is in its safe position. As a result, the slide is movable along the safety body for clearing the chamber of the pistol while the safety body is maintained in its safe position.

Abstract: A mechanism for a repeating firearm has a body pivotably mounted within the receiver and movable between a first position where it blocks motion of the bolt carrier, and a second position where it engages either the trigger or the hammer to prevent discharge. In operation the body is moved from the first position to the second to release the bolt carrier, which moves into battery. The body is then allowed to move out of the second position toward the first position. The rife may be discharged by a pull of the trigger, and the bolt carrier moves out of battery and is arrested by the body before moving back to battery. If the body is maintained in the second position during operation its engagement with the trigger or hammer prevents discharge of the firearm.

Abstract: An assembly for a bolt catch on a firearm having a bolt that slides between a latched position and an unlatched position, the bolt held in the latched position by a bolt catch mechanism that includes a catch-release actuator pivotally mounted on the rifle to provide for latching and unlatching of the bolt by a user, the assembly including a lever having an L-shaped body that comprises a first leg and a second leg that is formed at substantially a right angle to the first leg, the first leg having a free end on which is formed a mounting member; and a clamp member structured to attach to the mounting member on the lever to enable clamping of the lever to the catch-release actuator in a manner that does not require disassembly of the firearm or disassembly or removal of the catch-release actuator from the firearm.

Abstract: A bolt hold open (BHOA) catch assembly configured for operating with rimfire ammunition for use with a firearm including a receiver with an exposed receiving chamber. A BHOA housing is supported upon the lower receiver in communication with a receiver chamber in communication with a bolt assembly. A catch is supported in elevatable fashion relative to an end of the actuator housing and an end most and downward extending structural portion of the elevatable catch is capable of being manipulated by an externally configured and toggled bolt catch so that an inner pivoting end portion thereof engages the structural portion to raise the BHOA supported catch into contact with a forwardly traveling bolt, such as upon release of a previously retracted charging handle. The BHOA catch can alternatively be actuated upwardly by a suitably configured follower associated with an attachable and cartridge holding magazine, this again following a last shot hold open protocol.

Abstract: A firearm-magazine interface for replacing an existing firearm-magazine interface of many existing firearms such as assault rifles, namely AK series (AK74, AK47, etc.) provides a lock that holds open the bolt after a last round is fired from a magazine. The firearm-magazine interface also includes a single-button magazine eject. After firing the last round, a bolt-hold lock is urged upwardly in the path of the returning bolt and catches a face of the bolt, thereby locking the bolt open until the magazine is replaced with a replacement magazine, at which time a bolt-hold release paddle pulls the bolt-hold lock downwardly, releasing the bolt to chamber a first round from the replacement magazine.

Abstract: Embodiments of the present invention provide firearm receiver with ambidextrous features. Some of these features include a bolt-locking mechanism on a firearm receiver that is configured to allow an operator to clear jams while maintaining hold of a firing grip. The bolt-locking mechanism may include a linking mechanism configured to manipulate a bolt-catch device in response to activation of a magazine release button on a firearm receiver. Other features include an ambidextrous magazine release mechanism on a firearm receiver that is configured to allow an operator to release an inserted magazine while maintaining hold of a firing grip with either hand. The magazine release mechanism may include a linking mechanism configured to manipulate a magazine catch device in response to activation of either a right-handed magazine release button or a left-handed magazine release lever that pivots on an external fulcrum on a firearm receiver.

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 combination magazine and outer skin for a firearm including a magazine core adapted to releasably engage a firearm in communication with an action assembly associated with the firearm. Multiple cores are stackable end-to-end to define a continuous interior, with an end cap engaging an open bottom of a lowermost core. A design indicia exhibits an interior recess and is assembled around the stacked cores. A dual use follower is in use with an uppermost located magazine and maintains the assembly bolt in an open position and following the last cartridge being fired until such time as the magazine is removed. In the further variant, with a BHOA installed in place, the follower activates the BHOA and the bolt to remain in the retracted/open position, following magazine removal.

Abstract: A bolt catch assembly configured for operating with rimfire ammunition for use with a firearm including a receiver with an exposed receiving chamber. The assembly includes a bolt catch actuator housing supported in seating fashion relative to the receiving chamber and communicating with an attachable magazine. A catch actuator is supported in elevatable fashion relative to an end of the actuator housing. A bolt catch component and integrally formed actuator catch engaging portion is slaved to the catch actuator in order to be displaced in response to elevating motion exerted upon the catch actuator, such as by a follower component biasingly disposed within the magazine. The follower, in its uppermost displaced position within the attached magazine, engages a tab associated with the catch actuator which extends over a communicating interior of the bolt catch actuator housing in communicating alignment with the exposed receiving chamber.

Abstract: A bolt catch assembly for use with a firearm including a receiver with an exposed receiving chamber and an underside engageable magazine. The assembly includes a bolt catch actuator housing supported in seating fashion relative to the receiving chamber and communicating with an attachable magazine. A catch actuator is supported in elevatable fashion relative to an end of the actuator housing. A follower component is upwardly and biasingly disposed within the magazine and which, upon contacting the catch actuator, displaces an associated bolt catch of the firearm in an upper and bolt restraining position.

Abstract: A firearm includes a receiver, a lower receiver, a magazine supported by a magazine catch, a grip, a bolt and a bolt-slide, and a slide catch lever. The bolt and bolt-slide are moveable during the firing procedure of a shot. The slide catch lever automatically blocks the bolt-slide when the magazine is empty. The firearm also includes a moveable ergonomic control group that includes a control button to eject the magazine and activate the slide catch lever. The moveable ergonomic control group also includes a vertical rod, which extends above from the button as far as the slide catch lever. The moveable ergonomic control group is manually activated by the user with the same hand holding the grip.

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: 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: An improved bolt carrier for a firearm is provided that improves the overall reliability and performance of the firearm bolt assembly. The bolt carrier includes a bolt with a body having a number of lugs extending therefrom. The bolt includes an extractor recess sized and configured to avoid any undercut of the lugs adjacent the recess. The bolt also includes an extractor pivotably engaged in a recess formed in the bolt. The extractor has a pair nipples on flanges configured to engage a pair of integrally buffered springs disposed on a tapered spring well on either side of a firing pin bore extending through the bolt.

Abstract: An ambidextrous bolt catch device, apparatus, system and methods for using are provided. Four main components include a bolt catch finger, lever system and plunger rod assembly with torsion spring. The lever system includes a right release lever and a left release lever; the left lever is an integral part of the bolt catch finger. The plunger rod assembly abuts and connects the right and left levers; a torsion spring on the rod creates tension causing rotation of the bolt catch finger in a downward or upward position. In an upward position, the bolt catch finger engages the bolt, retains the bolt in a rearward position, and signals the operator that the magazine is empty. The bolt engaged by the finger is held rearward in a safe, reliable manner to allow an unobstructed view of the firearm chamber until manually released using either the right or left release lever.

Abstract: A multi-caliber ambidextrously controlled firearm that includes an adjustable ejection system to facilitate the ejection of spent cartridge casings from a firearm. The adjustable ejection system includes an ejection port defined by an aperture in the firearm and a deflector. The deflector is attached to the firearm to adjust the size of the ejection port and may be attached at one of at least two attachment positions of the firearm. The adjustable ejector system includes an ejector selectively attached to the firearm at one of at least two ejector attachment positions. The improved firearm also includes an ambidextrous magazine catch system for selectively retaining a magazine within a firearm. The magazine catch system includes a first button opposite a second button such that either button may be actuated by a user to release the magazine retained with the firearm.

Abstract: An improved bolt carrier for a firearm is provided that improves the overall reliability and performance of the firearm bolt assembly. The bolt carrier includes a bolt with a body having a number of lugs extending therefrom. The bolt includes an extractor recess sized and configured to avoid any undercut of the lugs adjacent the recess. The bolt also includes an extractor pivotably engaged in a recess formed in the bolt. The extractor has a pair nipples on flanges configured to engage a pair of integrally buffered springs disposed on a tapered spring well on either side of a firing pin bore extending through the bolt.

Abstract: A module housing is adapted to be inserted into an operating position in the trigger group receiving area of a firearm. The module housing includes at least one pin receiver defined by two openings formed in the module housing, one on each lateral side of the housing. A module pin is received in the pin receiver and at least one trigger group component is mounted or supported for rotation on the module pin. The pin receiver is located on the module housing so as to align with a pin receptacle of the firearm when the module housing is in the operating position. By locating the pin receiver in the module housing so as to align with a corresponding pin receptacle of the firearm when the module housing is in the operating position, the trigger group module and the trigger group components housed in the module housing may be readily supported by the OEM pin receptacle.

Abstract: A firearm bolt locking mechanism includes a locking pin in the bolt carrier of a firearm like an AK-47 assault rifle or variant thereof. The locking pin is normally urged from the bolt carrier by a compressed spring. The mechanism also includes a pivot arm mounted on the receiver cover of the firearm. The pivot arm has a spring-biased finger that normally fills a hole in the receiver cover. The mechanism further includes a magazine that stops the bolt of the firearm when the last cartridge from the magazine is fired and permits the spring to drive the locking pin into the hole. After replacing the empty magazine with a full one, the pivot arm is pressed to replace the locking pin in the hole with the finger and to release the bolt carrier to chamber a cartridge.

Abstract: A method for locking a firearm in an “open” position involves blocking some portion of the firearm's action (internal operational mechanism) with a selectively-extendable locking device accessible from outside the firearm. More specifically, the locking device is positioned at one of a plurality of pre-selected locations on the firearm, and includes a plunger that lies retracted when the device is unlocked, and that extends into the interior of the firearm when locked. The pre-selected location is chosen such that: (i) when locked, the locking device interferes with the firearm's action, preventing it from being closed, and the firearm from being fired; (ii) the locking device can only be locked when the firearm's action is in an open position, with the chamber visually exposed; and (iii) to the extent one is able to operatively disassemble the firearm when the locking device is locked, the locking device cannot be defeated internally.

Abstract: A bolt catch assembly including a bolt engagement leg, a sliding member engagement leg, a contact member and an arrangement for enabling the bolt catch assembly to pivot about a pivot axis. The bolt engagement leg is configured for engaging a bolt of a firearm to hold the bolt in an open position. The sliding member engagement leg is connected to the bolt engagement leg. The contact member resiliently mounted on the sliding member engagement leg. The contact member is configured for being displaced between a static position and a displaced position whereby a catch engagement force is generated in response to the contact member being moved from the static position toward the displaced position. The arrangement for enabling the bolt catch assembly to pivot is disposed between the bolt engagement leg and the sliding member engagement leg thereby enabling the bolt engagement leg and the sliding member engagement leg to be pivoted in unison about the pivot axis of the bolt catch assembly.

Abstract: The present invention relates to an automatic bolt hold-open rotating assembly to convert a manual bolt hold-open function to an automatic bolt hold-open function in automatic and semi-automatic pistols and rifles, such as the Ruger 10/22 semi-automatic .22 caliber rifle. The components of the assembly readily replace standard factory components in the trigger assembly and replace the standard magazine. The assembly comprises a magazine with channel cutout, a bolt stop, a bolt stop handle for manual manipulation of the assembly, a bolt stop spring to apply clockwise pressure on assembly, a cartridge detecting lever which also serves as a cartridge ejector pivotably mounted on bolt stop with an extension which interfaces with channel cutout of magazine, a tab protruding from the ejector lever which rides in a slot on the bolt stop to limit pivoting of the cartridge detecting lever, and a lever spring allowing counter-clockwise pivoting of cartridge detecting lever to facilitate insertion of recharged magazine.

Abstract: A device is disclosed for a weapon for firing burst of several shots. The device unlocks and latches the rifle bolt in the rear position to avoid heat distribution from the chamber or barrel to the powder or explosives in the booster charge or the explosive projectile, and to prevent firing by emptying or handling the weapon. The activator moves the trigger into engagement with the stop flap of the rifle bolt, thereby releasing the spring force of the rifle bolt forwardly during firing only when the rifle bolt and the cover are in the locked position.

Abstract: A shoulder-launched multiple-purpose assault weapon having a modified spotter rifle with a top-mounted rocket launcher tube is provided. The spotter rifle forms the base structure of the weapon and all weapon controls are located on the spotter rifle. The spotter rifle has several dual-function mechanisms which perform the combined functions of assembly and safing, bolt-locking back and cartridge ejecting, simultaneous adjustment of both open and optical sights, firing, selectively, of both the spotter round and the rocket round. The combination of these dual-firing mechanisms provides a lighter weight, better-balanced and smaller weapon. The reduction in parts count improves reliability and lowers cost. Other improved features include an adjustable spotter rifle barrel used to match the boresight of the rocket tube and an improved locking mechanism. A dual function trigger assembly operated two sears from a single trigger.

Abstract: A combination bolt lock and cartridge ejector mechanism for a small arm is rovided. The mechanism has a hollow cylindrical bolt lock having slots cut through the cylinder and having beveled shoulder on the bolt engaging end. The cartridge ejector is also slotted and fits inside the hollow bolt lock. A single spring inside the bolt lock operates both the bolt lock and the cartridge ejector. A retaining pin secures the mechanism together and provides a means for attaching the mechanism to a receiver of a small arm.

Abstract: The firearm comprises a manual control (13) for deactivation of the retainer of a cartridge magazine (8) by release of a tooth (16) from a notch (17) of the magazine and a device for the automatic ejection of the magazine. The automatic ejection device comprises a finger (25) for the actuation of the tooth (16), which is integral with the cartridge elevator piston (19) of the cartridge magazine (8), to come against the retainer of the latter and cause its ejection before the end of the elevation stroke of the cartridge elevator piston during the chambering of the last cartridge (12) under the thrust of the spring (20) of this piston against an activation spring (18) of the retainer. After the ejection of the empty cartridge, the retainer (13) is again activated by its spring (18) and, during the replacement of this magazine, a cartridge (12) is thus chambered and the firearm is ready to fire.

Abstract: A semi-automatic or automatic pistol of the kind that has a slide catch, having an automatic slide catch release mechanism located within the magazine chamber and comprising:i) a first bar adapted for reciprocation in longitudinal direction and biased into the uppermost position, comprising near the upper end means for pulling the lever from the slide engaging to the slide releasing position;ii) a second bar normally aligned with said first bar, adapted to reciprocate longitudinally and fitted near its distal end with motion transmission means;iii) a resilient link linking said first and second bars whereby an additional degree of freedom is imparted to the latter to be swingable out of alignment with said first bar;iv) an actuator member reciprocable between upper and lower positions and which in the lower position projects partly out of the magazine chamber, there being provided stop means for arresting the actuator in its lower position; andv) a swingable pawl pivoted intermediary between two end portions

Abstract: A device used especially in a large caliber weapon for controlling the train of motion of an ammunition unit during the ramming thereof in the weapon, and of the case of the ammunition unit on firing of the gun includes an impact arrangement which upon ramming of the ammunition unit enter into interaction with and retard the ammunition unit. An energy storing device is chargeable through the impact with kinetic energy existing in the retarding ammunition unit. In response to energy transmitted from the energy storing device the closing of the breech block is activated. The breech block in the closed position retains the case of the ammunition unit during the firing and during a predetermined portion of the rearwardly directed movement in the gun effected on firing. The impact arrangement includes an impact member interactable with a flange on the case and displaceable in the longitudinal direction of the gun, and an impact spring means interactable with the impact member and with an impact piston.

Abstract: An automatic firearm such as an automatic pistol having a slide and a thumb-engageable control on each side of the firearm for selectively securing the slide in retracted, inoperative position. This permits the firearm to be operated with equal facility and speed by either a right-handed or a left-handed marksman. A detent for retaining the slide in retracted position is mounted within the frame of the firearm for selective cooperation with a latch. A cross pin mounted for oscillation in the frame of the firearm has a lever mounting the detent fixedly connected thereto. Fixedly connected to one end of the pin outwardly of the frame of the firearm on a first side thereof there is a radially extending first detent control arm. On the other, second end of the pin, on the other side of the frame there is removably attached a second detent control arm, preferably identical with the first control arm, and disposed in the same angular position with respect to the pin.

Abstract: A gun which has an improved firing mechanism which enables it to be completely automatic through ejection of the magazine by eliminating the need for a selector switch. The firing mechanism has a substantially J-shaped hammer with a sear embedded therein. The sear is shaped, preferably hemispherically, at its framework end so that it will fall into a recess in the framework during the firing cycle. The draglink has a curved upper surface which is preferably concave or bowl-shaped. An associated magazine follower has a cam at its front center for tripping a release latch.

Abstract: In a locked-breech, short recoil, pistol type fire arm, the breech block slide (B) is provided with a separate locking block (E) engageable with both the barrel (C) and the slide (B) and accommodated between the underside of the barrel (C) and the upper surface of a movable trigger guard (D). Hold open means (X) are provided operable in the absence of cartridges in a magazine (T) or in the breech to allow the slide (B) to be held in the fully retracted position and simultaneously to release the trigger guard (D) for limited forward and downward movement, the trigger guard being provided with means which on movement of the trigger guard cause the locking block (E) to disengage from the barrel, whereby the barrel can be removed without the need for further disassembly of the fire arm.

Abstract: A safety catch for a self-loading pistol type fire arm is provided with a safety catch comprising an arbor (HH) rotatable in the fire arm frame (A) by means of manual levers (HH2 and JJ2) mounted outside the frame on either side. From a rest or off position, in which the fire arm can be fired, the arbor can be rotated upwardly to an end position in which means on the arbor engage the hammer (J) when it is in either the cocked or uncocked position, to lock it against rotation and thus prevent the pistol being fired. Additionally, when the hammer is cocked, the arbor can be rotated in the opposite direction, in which case it causes rotation of a detent member (LL) which lifts the ejector (L) to engage and hold the firing pin and to retract the end (S2) of the firing pin (S) struck by the hammer (J) within the slide (B) and thereafter to trip the sear (K) to release the hammer (J) safely from the cocked to the uncocked position.

Abstract: Disclosed is a slide stop assembly for a handgun including a slide stop pivotal from an inoperative position into a position engaging the slide when the latter is in a recoiled position. A generally flat, shallow V-shaped, side plate is secured along one side of the frame against rotation or rocking movement. The securement is effected by engagement of the side plate at spaced points therealong with the respective hammer and sear pins of the handgun. One leg of the side plate extends forwardly and terminates in a tab. A spring biased plunger on the slide stop engages the tab to preclude inadvertent pivoting of the slide stop from its inoperative detented position into its slide stop position.

Abstract: A self-loading firearm or pistol has an operating lever which can be actuated by the thumb of the shooting hand in order to release the hammer from its cocked position as well as to release the breech mechanism retaining the block in an open position. The operating lever comprises two operating lever members, each of which is disposed on one side of the firearm and both lever members are rigidly and firmly interconnected such that one of the operating lever members can be actuated by the thumb of the shooter's hand whether it is the right hand or the left hand.

Abstract: Action disabling device in a firearm having among its conventional components a spring-closed breech bolt, a tubular magazine, and a pivoted cartridge lifter. The disabling device is in the form of an operating arm pivoted with one end to a fixed part of the action so as to be swingable with its other end into active and inactive positions in which the same is in and out, respectively, of the closing path of the breech bolt, and is normally spring-urged into its inactive position, with this operating arm being, on overtravel of the lifter in lift direction for lack of a cartridge thereon, engaged and taken along by the lifter into its active position to stop the breech bolt on partial closure of the same. The operating arm is one of the arms of a double-arm lever the other arm of which projects to the outside of the receiver and is there accessible to an operator's finger for swinging the operating arm to its inactive position.