Abstract: A pump action firearm with bolt slide locking mechanism includes a receiver, a barrel assembly coupled by the receiver, and a bolt slide slideably disposed in the receiver for movement between rearward open breech and forward closed breech positions. A slide lock pivotably mounted to the bolt slide about a pivot axis is selectively engageable with an interference surface on the receiver. When the firearm is fired via a trigger pull, a rotatable hammer strikes and actuates the slide lock. The slide lock rotates from a locked position engaged with the interference surface to prevent the slide from moving out of the closed breech position, to an unlocked position disengaging the interference surface. This allows the slide to be manually moved to the open breech position for cycling the action. A manual actuator is provided for unlocking the slide lock absent a trigger pull.

Abstract: A self-releasing latch for a firearm charging handle is disclosed. The charging handle self-releasing latch includes a roller arm and a roller wheel. The roller arm includes a roller wheel at one end and a protrusion at the other end for engaging a spring. Further, a rocker feature provides a pivot point about midway of the roller arm. The roller wheel of the self-releasing latch engages with a detent or groove under spring force to hold the charging handle in the latched state. Aspects of the charging handle self-releasing latch are that it allows substantially frictionless operation of the charging handle without any manual actuation of levers and/or latches, and that it allows ambidextrous operation of the charging handle of an AR-style weapon platform. Further, a method is provided of retrofitting an existing firearm with the presently disclosed charging handle self-releasing latch.

Abstract: In weapon shot is fired during counterrecoil. The counterrecoil energy damps the recoil energy. During recoil, the breech block is unlocked, the spent cartridge case is ejected from the barrel by the residual pressure of the powder gases and is directed by a deflector into a hole in the gun carriage. When recoiling into the aftmost position, the barrel approaches the projectile and locks it by means of the breech block. Meanwhile, the next cartridge is taken from a magazine. In the event of misfire, the barrel, continuing to counterrecoil, actuates an extractor for removing the defective projectile. A recoil imitator returns the barrel to the aftmost position, where it is loaded with a projectile in a manner similar to the post-firing recoil. The technical result is ability to load the weapon automatically before firing or to reload the weapon automatically in the event of misfire.

Abstract: A firearm with an improved breech bolt assembly comprises a barrel (12), a breech bolt assembly (18, 21), a body (14) equipped on opposite sides with ports (15) for the ejection of a cartridge case, in addition to a magazine (17), wherein the breech bolt assembly, which is moveable with respect to the body (14) comprises a breech bolt-holder slide (21), a breech bolt (18) equipped with a rotating locking head (25), cam guide rails (26, 27) of the relative movement between the breech bolt (18) and slide (21), and also stopping means (28, 29) of the relative movement comprising a control pin (28) which can be moved vertically with respect to a first control seat (29), charged by a recoil spring (30) applied between the slide (21) and the pin (28), said pin (28) having a cocking handle (23), or reloading lever, rotatingly applied thereto, for the manual moving of the breech bolt assembly (10).

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: In an automatic shoulder arm designed as a gas operated weapon, especially an automatic rifle, the entire, fully operable weapon system, comprising the barrel, the bolt system, the gas operated action, the recoil spring arrangement, the cartridge feeding mechanism and a portion of the trigger mechanism, is slidably mounted in a receiver designed as a stock. During automatic fire, the weapon system is not returned to its initial position after every shot, but performs a recoil movement during a plurality of shots before it reaches a rear end position, which it maintains until the automatic fire is interrupted. The recoil movement can be utilized for controlling bursts of varying duration and cadence.