An automatic weapon system including a gas evacuation opening formed in a bore of a barrel, a gas evacuation chamber, a barrel immobilizing device, a slide, a weapon frame with guides for guiding slide movement, a return spring mechanism of the slide and the breech. The gas evacuation chamber is disposed at a near-bore space located at the barrel bore outlet, a front wall of the chamber located at the barrel bore outlet is attached at the barrel outlet and having a lower part resting on a weapon frame. A rear wall of the chamber is formed by at least one bridge assembly having one end attached to the slide and another end sliding along the barrel, the bridge assembly is formed by a substantially flat plate having a groove extending from the barrel to the frame and sliding along the barrel, at least one sealing gasket. The frame of the weapon serves as the lower part of the evacuation chamber, the slide serves as upper and side walls of the chamber, a downwardly directed ledge provided at the front of the slide.

A firearm including a gas drive, having an annular piston which is displaceably arranged on the barrel to form an expansion chamber between two end positions. At least one gas port penetrates the wall of the barrel in the region of the expansion chamber and a selector is provided. In order to provide a simple and easily adjustable mechanism, the expansion chamber is delimited by a ring surface and an inner cylinder surface of the piston, an end surface of the selector and the barrel. The selector is rotatably arranged on the barrel with at least two predefined rest positions. In each rest position, the gas flow from the expansion chamber is delimitable by at least one selector opening formed on the selector.

A firearm including a gas drive, having an annular piston which is displaceably arranged on the barrel to form an expansion chamber between two end positions. At least one gas port penetrates the wall of the barrel in the region of the expansion chamber and a selector is provided. In order to provide a simple and easily adjustable mechanism, the expansion chamber is delimited by a ring surface and an inner cylinder surface of the piston, an end surface of the selector and the barrel. The selector is rotatably arranged on the barrel with at least two predefined rest positions. In each rest position, the gas flow from the expansion chamber is delimitable by at least one selector opening formed on the selector.

A rifle with an auto-loading mechanism having a gas chamber with a guiding tube connected to a gas adapter, and a piston assembly including an impact damper, a piston slidingly movable within the gas chamber, a guide fixed to the piston at one end and provided at its other end with a blind hole, a fixed piston slidingly movable at one end within the blind hole of the guide and fixed to the impact damper at the other end, a helical spring arranged within the blind hole of the guide and a return helical spring arranged around the guide in a way to lean against a stop in the guiding sleeve with one end and against the impact damper with the other end, wherein the gas chamber is arranged on the rifle barrel in the area of the barrel receiver. The advantage of the rifle lies in that it allows for more accurate shooting, has lower weight and less recoils.

A rifle with an auto-loading mechanism having a gas chamber with a guiding tube connected to a gas adapter, and a piston assembly including an impact damper, a piston slidingly movable within the gas chamber, a guide fixed to the piston at one end and provided at its other end with a blind hole, a fixed piston slidingly movable at one end within the blind hole of the guide and fixed to the impact damper at the other end, a helical spring arranged within the blind hole of the guide and a return helical spring arranged around the guide in a way to lean against a stop in the guiding sleeve with one end and against the impact damper with the other end, wherein the gas chamber is arranged on the rifle barrel in the area of the barrel receiver. The advantage of the rifle lies in that it allows for more accurate shooting, has lower weight and less recoils.

The invention relates to a firearm (100) comprising a barrel (101) comprising a gas opening, and a gas system (10), which gas system (10) comprises a gas block (11), a gas piston (12), a force transmitter assembly (13), an indexing part (21) and an indexing counterpart (22), gas openings (18). The gas block (11) is fixedly attached to the barrel and the gas piston (12) is positioned by the indexing part (21; 22). In the gas system (10) gas is configured to pass through the gas opening of the barrel (101) via the gas openings (18) of the gas system into the gas block (11) and to set the gas piston (12) to movement. In the gas system (10) the gas piston (12) during its movement backwards is configured to close the gas opening of the barrel (101) for a defined time period and the gas piston (12) is not transmitting power/energy from combustion gas to the force transmitter assembly (13) unless the gas opening/-s (18) is/are closed.

The invention relates to a firearm (100) comprising a barrel (101) comprising a gas opening, and a gas system (10), which gas system (10) comprises a gas block (11), a gas piston (12), a force transmitter assembly (13), an indexing part (21) and an indexing counterpart (22), gas openings (18). The gas block (11) is fixedly attached to the barrel and the gas piston (12) is positioned by the indexing part (21; 22). In the gas system (10) gas is configured to pass through the gas opening of the barrel (101) via the gas openings (18) of the gas system into the gas block (11) and to set the gas piston (12) to movement. In the gas system (10) the gas piston (12) during its movement backwards is configured to close the gas opening of the barrel (101) for a defined time period and the gas piston (12) is not transmitting power/energy from combustion gas to the force transmitter assembly (13) unless the gas opening/-s (18) is/are closed.

A magazine well for a firearm having an angled spine receiving portion. A charging handle for a firearm having latch that extends below a bottom surface of a crossbar. A bolt carrier for a firearm having a pair of vent holes disposed in the indented portion and at least one additional vent hole on indented portion adjacent to the pair of vent holes. A bolt catch for a firearm having a receiving portion curved to match the contours of a human thumb. A scope assembly for a firearm having markers on a scope and amount that correspond to the same radial positions. A bolt for a firearm having a plurality of ribs disposed on a main body and extending from a front end toward a tail portion of the bolt.

A magazine well for a firearm having an angled spine receiving portion. A charging handle for a firearm having latch that extends below a bottom surface of a crossbar. A bolt carrier for a firearm having a pair of vent holes disposed in the indented portion and at least one additional vent hole on indented portion adjacent to the pair of vent holes. A bolt catch for a firearm having a receiving portion curved to match the contours of a human thumb. A scope assembly for a firearm having markers on a scope and amount that correspond to the same radial positions. A bolt for a firearm having a plurality of ribs disposed on a main body and extending from a front end toward a tail portion of the bolt.

An automatic weapon system including a gas evacuation opening formed in a bore of a barrel, a gas evacuation chamber, a barrel immobilizing device, a slide, a weapon frame with guides for guiding slide movement, a return spring mechanism of the slide and the breech. The gas evacuation chamber is disposed at a near-bore space located at the barrel bore outlet, a front wall of the chamber located at the barrel bore outlet is attached at the barrel outlet and having a lower part resting on a weapon frame. A rear wall of the chamber is formed by at least one bridge assembly having one end attached to the slide and another end sliding along the barrel, the bridge assembly is formed by a substantially flat plate having a groove extending from the barrel to the frame and sliding along the barrel, at least one sealing gasket. The frame of the weapon serves as the lower part of the evacuation chamber, the slide serves as upper and side walls of the chamber, a downwardly directed ledge provided at the front of the slide.