Abstract: A firearm suppressor includes a muzzle mount; blast, intermediate and distal baffle cups; a distal end cap; and a shroud. The muzzle mount, baffle cups, and end cap thread together at threaded interfaces. Each baffle cup has an externally threaded proximal segment threadably received in the proximally adjacent component. The distal baffle cup has an externally threaded distal segment received in the end cap. The components are shaped and arranged to form sealed interfaces upstream of the threaded interfaces along the flow path of gas through the suppressor. The baffle cups include baffle walls defining chambers sized and arranged to limit first round pop. The baffle walls define vent passages extending along axes oriented at skew angles with respect to the axes of the baffle cups. A distal baffle cup includes an annular recess for reducing the weight of the suppressor adjacent the distal end.

Abstract: A firearm sound suppressor and associated methods. The suppressor can include first and second firearm connectors at opposite ends of the suppressor for connecting to firearm mounts of different types. The suppressor can include symmetrical baffling and/or symmetrical gas flow passaging such that sound reduction performance of the suppressor is generally the same notwithstanding whether the first or second firearm connectors is used to connect the suppressor to the firearm. A protector can be used to protect the firearm connector that is not connected to the firearm.

Abstract: A firearm suppressor includes a muzzle mount; blast, intermediate and distal baffle cups; a distal end cap; and a shroud. The muzzle mount, baffle cups, and end cap thread together at threaded interfaces. Each baffle cup has an externally threaded proximal segment threadably received in the proximally adjacent component. The distal baffle cup has an externally threaded distal segment received in the end cap. The components are shaped and arranged to form sealed interfaces upstream of the threaded interfaces along the flow path of gas through the suppressor. The baffle cups include baffle walls defining chambers sized and arranged to limit first round pop. The baffle walls define vent passages extending along axes oriented at skew angles with respect to the axes of the baffle cups. A distal baffle cup includes an annular recess for reducing the weight of the suppressor adjacent the distal end.

Abstract: A firearm sound suppressor and associated methods. The sound suppressor includes a distal end wall and a flash hider on the distal end wall for reducing flash at an outlet of the suppressor. The sound suppressor can include a core including gas baffling integrally formed with the distal end wall and the flash hider. The flash hider can include a plurality of arms having slots therebetween and extending distally away from the distal end wall.

Abstract: A rotary ammunition magazine cooperates with a bolt catch to hold the bolt of a firearm out of battery in an open position after the last round has been fired. A cam mounted on the rotor of the magazine actuates a movable body on the magazine housing as the cam rotates to feed ammunition to the action. The body moves to an extended position and engages a bolt catch pivotably mounted in the firearm receiver. The bolt catch is pivoted by the body into a position where it will engage the bolt and prevent it from returning to battery after the last round has been fired.

Abstract: A gas diffuser for a firearm muzzle accessory such as a firearm sound suppressor, flash hider, or muzzle brake. The gas diffuser includes a diffuser baffle extending helically around the projectile passage. A firearm sound suppressor including the gas diffuser can include a housing and gas baffling inside the housing downstream from the gas diffuser.

Abstract: A magazine catch uses a spring biased plunger captured within a housing to bias the housing into engagement with a magazine to retain the magazine within the firearm. The plunger has a projection which engages the frame of the firearm. The plunger is rotatable relatively to the housing to orient the projection in opposite directions and thus permits the magazine catch to be reversibly positioned within the frame.

Abstract: An ammunition magazine for semiautomatic firearms has an opening at the end of a tube which is offset from the geometric center of the tube cross section and which is skewed about an axis extending lengthwise along the tube and through the geometrical center. Offset and skew of the opening are achieved by asymmetrically positioning the feed lips defining the opening relatively to the axis as well as angularly orienting the lips relatively to the bore of the tube.

Abstract: A monocore for a sound suppressor that significantly enhances the trapping and delay of the gases exiting from the sound suppressor due to the design, location, and configuration of slanted baffles and angled half-baffles, and a plurality of rods. The slanted baffles help define the blast chamber, expansion chambers, and exit chamber of the monocore. The plurality of rods may be positioned in the blast chamber or the expansions chambers. The plurality of rods may vary in length. The plurality of rods may also replace the angled half-baffles.