Abstract: 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.

Abstract: A recoil spring abutment for a slide of a pistol, the slide including slide grooves on both sides, and the recoil spring abutment being designed to be insertable and mountable in the slide and includes a preferably essentially semi-cylindrical base body having at least partially continuous guide rails on both sides, and an essentially circular step on a rear side for accommodating a recoil spring assembly. The invention also relates to a modular slide for such a recoil spring abutment, as well as to a slide cover sleeve, which may be mounted on the slide by means of the latter, and to the slide cover sleeve itself.

Abstract: Slide cover plates, and handguns including the slide cover plates, where the slide cover plates include a primary cover plate portion and a sealing cover plate portion that is movably coupled to the primary cover plate portion so that the sealing cover plate portion has an open position and a closed position, and when in its closed position the slide cover plate provides protection for the interior of the handgun, and when in its open position the slide cover plate does not interfere with the forward movement of the pistol slide.

Abstract: A breech for a pistol including a barrel, which includes at least one barrel block and one chamber, as well as a slide and a breech guide, which is designed to move on a guide rail of a frame of the pistol and on which a socket having a breech face is formed. In order to increase the mechanical stability, the barrel block includes at least one recess on each side, which interacts with centering rails that are provided on the inside of the breech guide and are formed to be complementary to the recesses in terms of form and function.

Abstract: 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.

Abstract: Slide cover plates, and handguns including the slide cover plates, where the slide cover plates include a primary cover plate portion and a sealing cover plate portion that is movably coupled to the primary cover plate portion so that the sealing cover plate portion has an open position and a closed position, and when in its closed position the slide cover plate provides protection for the interior of the handgun, and when in its open position the slide cover plate does not interfere with the forward movement of the pistol slide.

Abstract: A rifle with a barrel firmly mounted in a framework, the barrel including a locking sleeve, a lock, a sliding block, and a gas-powered actuator. Advantageously quiet operation of the gas-powered actuator is accomplished when the actuator has an annular piston, which is movable on a plunger support, forming an expansion chamber, where the actuator acts on the sliding block via push rods and is pushed forward by reset springs, and the rifle further includes a gas borehole penetrating the walls of the barrel and the plunger support, and further where the plunger support includes an outlet channel in its front, upper range, which is fluidly separate from the expansion chamber when the annular piston is at rest, and is fluidly connected with the expansion chamber after a backward displacement of the annular piston.

Abstract: A rifle with a barrel firmly mounted in a framework, the barrel including a locking sleeve, a lock, a sliding block, and a gas-powered actuator. Advantageously quiet operation of the gas-powered actuator is accomplished when the actuator has an annular piston, which is movable on a plunger support, forming an expansion chamber, where the actuator acts on the sliding block via push rods and is pushed forward by reset springs, and the rifle further includes a gas borehole penetrating the walls of the barrel and the plunger support, and further where the plunger support includes an outlet channel in its front, upper range, which is fluidly separate from the expansion chamber when the annular piston is at rest, and is fluidly connected with the expansion chamber after a backward displacement of the annular piston.

Abstract: A practice weapon, having a conventional handle piece with a lock for a drop barrel, with a trigger mechanism which optionally has a rotary bearing for a rotatable trigger, with a spring base on which the return spring is supported; and with a practice breech with a fixed practice barrel. In order to permit a conversion without the use of a tool, an adapter is inserted into the handle piece, the adapter being supported firstly above the trigger mechanism, optionally above the rotary bearing, on a brace and secondly in the upper region of the spring base of the handle piece. Furthermore, the upper region of the adapter has guides for the practice barrel, and the lock interacts with a locking carriage, which is formed in a locking slot of the adapter, in such a manner that the locking carriage secures the practice barrel.

Abstract: A practice weapon, having a conventional handle piece with a lock for a drop barrel, with a trigger mechanism which optionally has a rotary bearing for a rotatable trigger, with a spring base on which the return spring is supported; and with a practice breech with a fixed practice barrel. In order to permit a conversion without the use of a tool, an adapter is inserted into the handle piece, the adapter being supported firstly above the trigger mechanism, optionally above the rotary bearing, on a brace and secondly in the upper region of the spring base of the handle piece. Furthermore, the upper region of the adapter has guides for the practice barrel, and the lock interacts with a locking carriage, which is formed in a locking slot of the adapter, in such a manner that the locking carriage secures the practice barrel.