A firearm comprises a frame defining a bolt passage, with a reciprocating bolt received in the passage. The frame defines a magazine well, and a top cover having a forward end pivotally connected to the frame and defining an upper portion of the bolt passage.

A firearm comprises a frame defining a bolt passage, with a reciprocating bolt received in the passage. The frame defines a magazine well, and a top cover having a forward end pivotally connected to the frame and defining an upper portion of the bolt passage.

A weapon for firing cased telescoped (CT) ammunition includes a barrel, a chamber member and a carrier assembly. The chamber member defines a chamber for a CT round for firing, and translates between a firing position aligned with the barrel and an ejection/loading position. The chamber member is spring-biased toward the firing position. Dual-feed structure provides for both a magazine mode as well as a belt feed mode of operation.

A weapon for firing cased telescoped (CT) ammunition includes a barrel, a chamber member and a carrier assembly. The chamber member defines a chamber for a CT round for firing, and translates between a firing position aligned with the barrel and an ejection/loading position. The chamber member is spring-biased toward the firing position. Dual-feed structure provides for both a magazine mode as well as a belt feed mode of operation.

The invention relates to a firearm comprising a housing (1) with a rigid barrel (2) arranged therein, a magazine that can be mounted in the receptacle of the housing (1) and provided with cartridges (4), a closure (3) that can be moved with respect to the housing (1) in the longitudinal direction of the barrel (2) and that is used to guide cartridges (4) from the magazine into a cartridge holder (5) or for ejecting empty cartridge cases. The closure (3) is mounted completely inside the housing (1) over its entire movement path. A sear frame (6) is coupled to the closure (3) which is tensioned by means of a closing spring (7) in the direction of the front closed position of the closure (3). The invention also relates to a locking block (8) coupled to the closure (3) when the closure is in the front closed position. The locking block (8) can be tensioned by a locking spring (9) in the direction of said position, and the locking block (8) can be moved when triggering a shot through the closure (3) by compressing the locking spring (9) only for one part of the movement path of the closure (3) until the decoupling position is reached together with the closure (3).

A shear resistant bolt carrier and gas key are provided having a mating recoil lug and recoil lug slot that transfer shear forces between the gas key and bolt carrier to reduce and eliminate shear forces on the screw attachment points and eliminate a point of failure in the bolt carrier group (BGC).

A shear resistant bolt carrier and gas key are provided having a mating recoil lug and recoil lug slot that transfer shear forces between the gas key and bolt carrier to reduce and eliminate shear forces on the screw attachment points and eliminate a point of failure in the bolt carrier group (BGC).

A weapon for firing cased telescoped (CT) ammunition includes a barrel, a chamber member and a carrier assembly. The chamber member defines a chamber for a CT round for firing, and translates between a firing position aligned with the barrel and an ejection/loading position. The chamber member is spring-biased toward the firing position. Dual-feed structure provides for both a magazine mode as well as a belt feed mode of operation.

The invention relates to a firearm comprising a housing (1) with a rigid barrel (2) arranged therein, a magazine that can be mounted in the receptacle of the housing (1) and provided with cartridges (4), a closure (3) that can be moved with respect to the housing (1) in the longitudinal direction of the barrel (2) and that is used to guide cartridges (4) from the magazine into a cartridge holder (5) or for ejecting empty cartridge cases. The closure (3) is mounted completely inside the housing (1) over its entire movement path. A sear frame (6) is coupled to the closure (3) which is tensioned by means of a closing spring (7) in the direction of the front closed position of the closure (3). The invention also relates to a locking block (8) coupled to the closure (3) when the closure is in the front closed position. The locking block (8) can be tensioned by a locking spring (9) in the direction of said position, and the locking block (8) can be moved when triggering a shot through the closure (3) by compressing the locking spring (9) only for one part of the movement path of the closure (3) until the decoupling position is reached together with the closure (3).

A weapon for firing cased telescoped (CT) ammunition includes a barrel. a chamber cavity aligned with the barrel, and a translating chamber member defining a chamber for holding a CT round for firing. The chamber member moves between a firing position in the chamber cavity and an ejection/loading position for ejecting a spent CT round and receiving a next CT round. A breech member closes a rear end of the chamber. A carrier performs a counter-recoil operation in which (1) the chamber member is moved from the ejection/loading position to the firing position with the next CT round therein, and (2) the breech is urged into a closed position against the next CT round in the chamber to remove headspace before the next CT round is fired from the weapon.