Abstract: Firearms with gas piston assemblies have a receiver defining a passage receiving a reciprocating bolt assembly, a barrel defining a barrel axis and extending from the receiver in a forward direction and defining a barrel gas aperture, a gas block connected to the barrel and defining a piston bore in communication with the gas block bore, a piston assembly having a forward end operably engaged to the piston bore and a rear end operably engaged to the reciprocating bolt assembly, the piston assembly having a piston closely received in the piston bore and having a piston rear end, the piston assembly including an elongated intermediate rod having an intermediate rod forward end registered with the piston rear end and an intermediate rod rear end, and the piston assembly including a rear portion having a forward end registered with the intermediate rod rear end and a rear portion.

Abstract: Firearms with adjustable gas block regulators have a receiver defining a passage receiving a reciprocating bolt assembly, a barrel defining a barrel axis and extending from the receiver and defining a barrel gas aperture, a gas block connected to the barrel and having a gas block inlet registered with the barrel gas aperture, the gas block defining a gas block bore transverse to the barrel axis and in communication with the gas block inlet, the gas block bore defining a gas block bore axis, the gas block defining a gas outlet in communication with the gas block bore, a regulator closely received in the bore and operable to reciprocate along the gas block bore between at least a first position and a different second position, the regulator defining first and second gas paths having different gas flow characteristics.

Abstract: Firearms with charging handle slot covers have a receiver defining a passage receiving a reciprocating bolt assembly, the receiver having a wall defining an elongated slot, a handle external to the receiver and having a shank portion extending through the slot and an inner portion connected to the bolt assembly, a slot cover plate connected to the receiver and movable between a closed position at least partly covering the elongated slot and an open position at least partly exposing the elongated slot, and a cover element overlaying at least a portion of the slot cover plate. The slot cover plate may be spring biased to the closed position. The slot cover plate may be an elongated body with opposed ends independently movable with respect to each other. The slot cover plate may be configured to shift to cover the elongated slot away from the shank.

Abstract: Firearms with ambidextrous bolt hold-open have a receiver defining a magazine well configured to receive an ammunition magazine having a follower that is spring biased toward an open end, the receiver defining a passage receiving a bolt assembly operable to reciprocate between a forward battery position and a rear retracted position, the bolt assembly being operable to strip a cartridge from the magazine upon movement from the rear retracted position to the forward battery position, a bolt latch movable between a latched position in which the bolt latch prevents movement of the bolt assembly from the retracted position to the battery position, and an unlatched position in which the bolt latch permits movement of the bolt assembly from the retracted position to the battery position, the bolt latch being responsive to the magazine having an elevated follower without ammunition to move to the latched position.

Abstract: A bolt action firearm has a frame defining a bolt passage, an elongated bolt assembly configured to reciprocate within the bolt passage, the elongated bolt assembly defining a firing pin passage, a firing pin assembly received in the firing pin passage, a bolt handle having an inner end configured to removably engage the firing pin assembly and an opposed free end, the bolt handle inner end having opposed spaced-apart prongs defining a bolt handle channel, the bolt handle defining a pocket associated with the bolt handle channel, the firing pin assembly having a handle engagement portion having a first section configured to be received in the bolt handle channel, and the firing pin assembly having a second section adjacent to the first section such that when the second section is biased into the pocket, the firing pin assembly is secured against passage through the bolt handle channel.

Abstract: Firearms with charging handle slot covers have a receiver defining a passage receiving a reciprocating bolt assembly, the receiver having a wall defining an elongated slot, a handle external to the receiver and having a shank portion extending through the slot and an inner portion connected to the bolt assembly, a slot cover plate connected to the receiver and movable between a closed position at least partly covering the elongated slot and an open position at least partly exposing the elongated slot, and a cover element overlaying at least a portion of the slot cover plate. The slot cover plate may be spring biased to the closed position. The slot cover plate may be an elongated body with opposed ends independently movable with respect to each other. The slot cover plate may be configured to shift to cover the elongated slot away from the shank.

Abstract: Firearms with adjustable gas block regulators have a receiver defining a passage receiving a reciprocating bolt assembly, a barrel defining a barrel axis and extending from the receiver and defining a barrel gas aperture, a gas block connected to the barrel and having a gas block inlet registered with the barrel gas aperture, the gas block defining a gas block bore transverse to the barrel axis and in communication with the gas block inlet, the gas block bore defining a gas block bore axis, the gas block defining a gas outlet in communication with the gas block bore, a regulator closely received in the bore and operable to reciprocate along the gas block bore between at least a first position and a different second position, the regulator defining first and second gas paths having different gas flow characteristics.

Abstract: Firearms with ambidextrous bolt hold-open have a receiver defining a magazine well configured to receive an ammunition magazine having a follower that is spring biased toward an open end, the receiver defining a passage receiving a bolt assembly operable to reciprocate between a forward battery position and a rear retracted position, the bolt assembly being operable to strip a cartridge from the magazine upon movement from the rear retracted position to the forward battery position, a bolt latch movable between a latched position in which the bolt latch prevents movement of the bolt assembly from the retracted position to the battery position, and an unlatched position in which the bolt latch permits movement of the bolt assembly from the retracted position to the battery position, the bolt latch being responsive to the magazine having an elevated follower without ammunition to move to the latched position.

Abstract: Firearms with gas piston assemblies have a receiver defining a passage receiving a reciprocating bolt assembly, a barrel defining a barrel axis and extending from the receiver in a forward direction and defining a barrel gas aperture, a gas block connected to the barrel and defining a piston bore in communication with the gas block bore, a piston assembly having a forward end operably engaged to the piston bore and a rear end operably engaged to the reciprocating bolt assembly, the piston assembly having a piston closely received in the piston bore and having a piston rear end, the piston assembly including an elongated intermediate rod having an intermediate rod forward end registered with the piston rear end and an intermediate rod rear end, and the piston assembly including a rear portion having a forward end registered with the intermediate rod rear end and a rear portion.

Abstract: A rifle stock has a frame, a body having a butt pad connected to the frame and operable to move within a range of length of pull positions, the frame defining a plurality of pockets, each associated with a different length of pull position, the body defining a latch passage, a latch having a nose, the latch received in the latch passage and movable between a retracted position in which the nose is clear of the pockets and movement of the body is enabled for adjusting, and an extended position in which the nose is received in a selected one of the pockets, a release lever pivotally connected to the frame and operably connected to the latch, and the release lever movable between an operating position in which the latch is in the extended position, and an adjustment position in which the latch is in the retracted position.

Abstract: A bolt action firearm has a frame defining a bolt passage, an elongated bolt assembly configured to reciprocate within the bolt passage, the elongated bolt assembly defining a firing pin passage, a firing pin assembly received in the firing pin passage, a bolt handle having an inner end configured to removably engage the firing pin assembly and an opposed free end, the bolt handle inner end having opposed spaced-apart prongs defining a bolt handle channel, the bolt handle defining a pocket associated with the bolt handle channel, the firing pin assembly having a handle engagement portion having a first section configured to be received in the bolt handle channel, and the firing pin assembly having a second section adjacent to the first section such that when the second section is biased into the pocket, the firing pin assembly is secured against passage through the bolt handle channel.

Abstract: A magazine for improved stacking capacity includes a housing, a front wall connected to a back wall by sidewalls, a base, a spring adapted to be received inside a recess in the base in order to reduce the space occupied by the spring. The spring having various spiral sections wherein the spiral section having different lengths so that the spiral sections fit into each other when the spring is compressed against cartridges in order to enable stacking of additional cartridges.

Abstract: A pistol including a grip, a barrel slide movable on the grip in a firing direction, and a barrel capable of being interlocked with the barrel slide. A first locking device includes a projection provided on the outer contour of the barrel and has a forward-facing first inclined surface. A second locking device includes a lever pivotably guided in the barrel slide and a dog having a rearward-facing, second inclined surface cooperating with the first inclined surface. The unlocking means includes a stop that is provided in the grip and cooperates with a lug of the barrel. When the barrel impacts against the stop and the barrel slide continues its movement, the inclined surfaces slide relative to each other, and the lever is pivoted against the force of a spring such that the dog releases the barrel slide.

Abstract: For a pistol having a hollow pistol grip in which a magazine for rounds which is insertable from below is held, a magazine catch is provided which is realeasable from either side, offers a maximum of safety, is user friendly and has relatively few parts. The magazine has a lug on its front wall; in the front part of the pistol grip a sliding block is arranged so as to be displaceable in transverse direction, which is held in its middle position by at least one spring, in which position the lug rests on the sliding block. The sliding block has a vertical groove on either side of the lug, which can be brought into the path of movement of the lug during insertion of the magazine by displacement of the sliding block in either one of the two directions.

Abstract: A pistol includes of a pistol body, a slide and a trigger mechanism which includes: a firing bolt, a horizontal control ramp in the slide, a guide coulisse and a guide finger cooperating with the former, a control spring fastened in the pistol body and deflectable in transverse direction, and a trigger bar hinged to a trigger and cooperating with the control ramp, the guide coulisse and the control spring, the trigger bar having a catch nose retaining the firing bolt lug. To achieve enhanced smooth-running and reproducible precision with a minimum of production costs, the control spring has a disc in its upper end region, the contour of said disc being round in the plane of the trigger bar, and the trigger bar has a substantially vertical catch nose in its rear end region and an oblique rear edge cooperating with said disc.

Abstract: A pistol with a firing pin includes a firing pin safety provided in the breech part. To afford a firing pin safety that is as simple and operationally safe as possible, a resilient tongue attached on an external side face of the breech part is provided, which resilient tongue forms a hook extending into the interior of the breech part, which hook comes to lie in front of a shoulder provided on the striker when the latter is in its cocked position, and the resilient tongue has a downwardly projecting web which cooperates with the trigger arm. The resilient tongue is integrally formed with an ejector spring.