Abstract: Gun (1) comprising a gun frame (2); a barrel (4), supported by the gun frame (2), proximally delimiting a firing chamber (6) extending along a longitudinal axis (X); a slide (8), translatable longitudinally in relation to the barrel (4) between a forward configuration wherein the slide closes the firing chamber (6), and a rearward configuration wherein it is distanced from a proximal mouth (12) of the firing chamber (6), to open the latter; wherein orientation of said chamber (6) is substantially parallel to said axis (X) in the forward configuration and in the rearward configuration; and a locking device (10) mechanically locking barrel (4) and slide (8) to each other in the forward configuration, and that in the rearward configuration is guided transversally in relation to the barrel (4) for unlocking the slide (8).

Abstract: The mechanism comprises a main frame (1) and its extension (1?), which accommodate a barrel (21) with fixed mounting, a mobile bolt (22) and its guiding pin ensemble (66) and main spring (67) moving in the main frame (1), a mobile mass (34) and its assembly of guiding pin (60), push plate (61) and return spring (62), and a mobile mass catch sear (42) and its spring (7). The mobile mass pivots from a first position under the barrel to a downward position in reaction to the backward movement of the mobile bolt. The placement of the mobile mass in front of the chamber directs counteracting forces down on the barrel to prevent muzzle climb during operation.

Abstract: An automatic pistol essentially consists of an immovable barrel, a breech with a firing pin and a cartridge extractor, a breech frame, a spring-loaded device for the removal of gas with a gas piston and a gas cylinder, a firing mechanism and a magazine. The barrel is fitted with an end piece, which is located in the lower part of the rear end of the barrel. The design of the breech allows for the displacement of its front part downwards, when the breech is in its front end position. The front part of the breech is fitted with side locking lugs. The corresponding locking grooves are located in the cavities on the end piece of the barrel. The gas piston has an opening for ejecting the cartridge casing. In the course of the backward movement, the gas piston unlocks the breech and draws it back. In the forward movement, the breech is carried forward and pushed downwards. The gas cylinder is located at the front part of the barrel and encompasses the barrel. Along the length of the barrel gas ducts are fixed.

Abstract: A smooth-bore barrel semi-automatic shotgun include a frame comprising a breech. A barrel is slidingly mounted on the frame relative to the breech. A slide-bolt assembly, which slides relative to the breech, is adapted to close the barrel. A friction spring opposes the barrel's sliding movement relative to the frame.

Abstract: A bolt locking assembly for a weapon simulator, the weapon simulator having a bolt affixed to a firearm housing providing recoil to the user. The bolt is connected to a piston housed in a piston chamber inside the housing. A gas supply provides a compressed gas or fluid into the piston chamber to generate movement and recoil of the piston. After the weapon simulator has been fired a predetermined number of times, the bolt locking assembly will obstruct operation of the bolt and piston. The bolt locking assembly includes a lock actuator port engaging the piston chamber, a locking apparatus positioned within the housing proximate the bolt, and a lock channel between said lock actuator port and said locking arm, wherein the lock channel directs gas to said locking apparatus to actuate said locking apparatus and fix the bolt in place.

Abstract: This invention concerns a closing device for the barrel in semiautomatic and automatic pistols. The barrel (22) is equipped, in its lower rear part, with first lateral means (31) for interacting with the first complementary devices (28) at the sides of the breech-block (21) to hold the barrel closed when the breech-block is in the forward position, and with second means (32) designed to interact with the second complementary means (25) on an element (23) of the stock, for swinging the rear part of the barrel downward and the blocking of the barrel in order to open the gun when the breech-block is moved into the rear position.

Abstract: A breechblock system for a gun includes a breechblock; a firing pin slidably received in the breechblock and having two diametrically oppositely located catch recesses; and two locking levers pivotally supported by the breechblock on opposite sides thereof and each having first and second arms. The two locking levers have a locking position and an unlocking position. In the locking position the first arm of the respective locking levers projects into the respective catch recesses for preventing the firing pin from moving from its locked position into its firing position. Further, two bolts are provided which are movably supported on opposite sides of the breechblock and which cooperate with the breechblock and with respective locking levers. The bolts have a withdrawn position and an advanced position. In the withdrawn position the bolts are out of a depressing engagement with the respective locking levers, whereby the locking levers are maintained in the locking position by a force-exerting arrangement.

Abstract: A lightweight grenade launcher utilizing a rotary feed mechanism in conjunction with a toggle link bolt movement mechanism to incorporate the barrel, flash suppressor, bolt and toggle link mechanism as part of the gun's recoiling mass with the barrel moving during recoil and counter recoil through a center aperture in the rotary sprocket of the feed mechanism.

Abstract: A self loading firearm of the locked breech, short recoil pistol type has a barrel and a breech block slide provided with a separate locking block accommodated between the underside of the barrel and the upper surface of a movable trigger guard. The locking block is provided with means for positively locking the barrel to the slide during the high pressure period of the firing cycle of the firearm and means for enabling release of the slide from the barrel during the remainder of the firing cycle. Means described for permitting release of the locking block comprise a rotary catch which is rotatable between a position to hold the locking block in its barrel retaining position and a position in which the locking block is able to release the barrel.

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 gun mechanism for guns embodying safety mechanism. The mechansim includes a trigger, a sear, and a hammer in operative relationship. A disconnector member is carried by the trigger and is operative to disconnect the sear from the hammer for firing. An extending member extends from the bolt carrier to a position over the trigger mechanism. A link member is positioned between the extending member and the disconnector member and is operative to hold the disconnector member in an inactive position, that is, a safe position at all times unless the said extending member is in a fully forward closed and locked position of the bolt. A bolt carrier has a limited sliding relationship with the bolt which includes a bolt locking member. The carrier undergoes an initial movement before the bolt moves which operates the link member to the safe position, after which the bolt is unlocked for movement. Positive safety is provided in that the disconnector member is held inactive unless the bolt is fully closed and locked.

Abstract: A feature of this invention is the provision of a slider coupled to the gun bolt for camming the locking lugs and for positively retaining the lugs in their bolt-locking disposition.

Abstract: Automatic or semi-automatic sporting weapon of the type with gas tapping, characterized by the fact that it is fitted with a floating barrel.

Abstract: A short-recoil operated automatic firearm is provided with a single locking ember for alternately (1) locking the breech bolt to the barrel while unlocking the barrel from the receiver, and (2) unlocking the breech bolt from the barrel while locking the barrel to the receiver. The locking member is a lever pivoted intermediate its ends on the barrel and comprising an arm engageable with an abutment (barrel buffer) on the receiver, an opposite arm having a notch engageable with a locking projection on the breech bolt, and an intermediate arm engageable by the bolt in its return movement to rotate the lever to bolt-locking (and barrel unlocking) position.