Abstract: A magazine for rimmed cartridges includes a magazine tube having first left and right ribs on an inside of the magazine tube extend inward from a forward portion of opposite sidewalls and are laterally spaced by a first spacing. Second left and right ribs on an inside of the magazine tube extend inward from a rear portion of opposite sidewalls and are laterally spaced by a second spacing that is greater than the first spacing. When the magazine is filled to capacity with rimmed cartridges, cartridges in the magazine are arranged in two offset columns with projectiles of the rimmed cartridges laterally spaced from a median plane by a first distance and rims of the rimmed cartridges laterally spaced from the median plane by a second distance that is greater than the first distance. Also disclosed is a baseplate that attaches to a magazine tube using a snap fit.

Abstract: A breechblock assembly for a firearm includes a breechblock extending along a central axis and configured to reciprocate along a receiver of the firearm between a recoil position and a battery position. A lever on the breechblock is movable from a blocking position to a non-blocking position in response to the breechblock moving from the recoil position to the battery position. A spring biases the lever to the blocking position. When the lever is in the blocking position the lever prevents the firearm from firing.

Abstract: A handgun trigger has a trigger body configured for pivotable or rotatable movement when installed in a handgun. A trigger shoe is removably attached or attachable to the trigger body and defines a user interface for firing the handgun. The trigger shoe can be made of polymeric material and can be attached to the trigger body using a snap fit. For example, the trigger shoe snaps over rear-facing surfaces of the trigger body when installed. Also disclosed is a takedown lever assembly for a semiautomatic handgun, where the takedown actuation lever operable between a firing position and a takedown position. In the takedown position the takedown actuation lever permits removal of the slide from the frame. In the takedown position the trigger is blocked from rotating to the pulled trigger position.

Abstract: An adjustable firearm sight includes a body made of a flexible and resilient material. The body includes an elevation arm connected to the body and extending proximally therefrom to a sight portion, where the elevation arm and the body comprise a monolithic structure. A cam body below the elevation arm has a cam surface in contact with a bottom surface of the elevation arm, where the cam body is rotatable to change a vertical position of the sight portion. Also disclosed is a front sight assembly where a sight element is disposed in a longitudinal bore through a sight body. A proximal end of the longitudinal bore has a reduced size. At a distal end, a retention pin is disposed in a retention bore that extends transversely to and intersects the longitudinal bore such that the retention pin occupies the longitudinal bore to retain the sight element.

Abstract: A breechblock assembly includes a breechblock configured to reciprocate along a top of the firearm receiver between a recoil position and a battery position. An actuator is coupled to the breechblock and is configured to move between first and second positions. A lever on the breechblock in contact with the actuator is movable between a blocking position and a non-blocking position. For example, the lever is generally oriented along the central axis and extends rearward beyond a proximal face of the breechblock. When the actuator is in the first position, the lever is in the blocking position. When the actuator is in the second position the lever is in the non-blocking position. When assembled in a firearm, an end of the lever is positioned to block the hammer from striking the firing pin when the breechblock is out of battery by more than a predefined distance.

Abstract: An adjustable firearm sight includes a body made of a flexible and resilient material. The body includes an elevation arm connected to the body and extending proximally therefrom to a sight portion, where the elevation arm and the body comprise a monolithic structure. A cam body below the elevation arm has a cam surface in contact with a bottom surface of the elevation arm, where the cam body is rotatable to change a vertical position of the sight portion. Also disclosed is a front sight assembly where a sight element is disposed in a longitudinal bore through a sight body. A proximal end of the longitudinal bore has a reduced size. At a distal end, a retention pin is disposed in a retention bore that extends transversely to and intersects the longitudinal bore such that the retention pin occupies the longitudinal bore to retain the sight element.

Abstract: A magazine for rimmed cartridges includes a magazine tube having first left and right ribs on an inside of the magazine tube extend inward from a forward portion of opposite sidewalls and are laterally spaced by a first spacing. Second left and right ribs on an inside of the magazine tube extend inward from a rear portion of opposite sidewalls and are laterally spaced by a second spacing that is greater than the first spacing. When the magazine is filled to capacity with rimmed cartridges, cartridges in the magazine are arranged in two offset columns with projectiles of the rimmed cartridges laterally spaced from a median plane by a first distance and rims of the rimmed cartridges laterally spaced from the median plane by a second distance that is greater than the first distance. Also disclosed is a baseplate that attaches to a magazine tube using a snap fit.

Abstract: A breechblock assembly includes a breechblock configured to reciprocate along a top of the firearm receiver between a recoil position and a battery position. An actuator is coupled to the breechblock and is configured to move between first and second positions. A lever on the breechblock in contact with the actuator is movable between a blocking position and a non-blocking position. For example, the lever is generally oriented along the central axis and extends rearward beyond a proximal face of the breechblock. When the actuator is in the first position, the lever is in the blocking position. When the actuator is in the second position the lever is in the non-blocking position. When assembled in a firearm, an end of the lever is positioned to block the hammer from striking the firing pin when the breechblock is out of battery by more than a predefined distance.

Abstract: A takedown lever assembly for a semiautomatic handgun includes a receiver, a slide displaceable along a top of the receiver, a grip portion defining a magazine well, and a fire control group that includes a trigger pivotable between a resting position and a pulled trigger position. The takedown lever assembly includes a takedown actuation lever operable between a firing position and a takedown position. In the takedown position the takedown actuation lever permits removal of the slide from the frame. A safety block is operatively coupled to the takedown actuation lever, wherein moving the takedown actuation lever from the firing position to the takedown position moves the safety block rearward, thereby blocking the trigger from rotating to the pulled trigger position. In some embodiments, the takedown lever rotates counterclockwise from the firing position to the takedown position as viewed looking at a left side of the handgun.

Abstract: A handgun subassembly includes a frame with a distal frame portion and a proximal frame end portion, where the frame has frame rails extending longitudinally along a top of the frame. A slide is displaceable along the frame rails between a recoil position and a battery position. The slide defines a catch surface adjacent a bottom portion of the slide. A forward assist assembly is disposed between the slide and the frame or grip module. The forward assist assembly provides a force on the slide in a distal direction when the slide is within a predetermined distance from the battery position.

Abstract: A handgun subassembly includes a frame with a distal frame portion and a proximal frame end portion, where the frame has frame rails extending longitudinally along a top of the frame. A slide is displaceable along the frame rails between a recoil position and a battery position. The slide defines a catch surface adjacent a bottom portion of the slide. A forward assist assembly is disposed between the slide and the frame or grip module. The forward assist assembly provides a force on the slide in a distal direction when the slide is within a predetermined distance from the battery position.