Abstract: A tubular assembly for attaching accessories to gun barrels. The assembly includes a first tubular, including first interior threads on an interior surface thereof and a collet on a first end thereof. The assembly includes a second tubular, including first exterior threads on an exterior surface thereof. The first exterior threads mate with the first interior threads. The second tubular includes a ridge of knurls on the exterior surface thereof. The ridge of knurls is adapted to frictionally engage the collet when the first tubular and the second tubular are assembled.

Abstract: A tubular assembly for attaching accessories to gun barrels. The assembly includes a first tubular, including first interior threads on an interior surface thereof and a collet on a first end thereof. The assembly includes a second tubular, including first exterior threads on an exterior surface thereof. The first exterior threads mate with the first interior threads. The second tubular includes a ridge of knurls on the exterior surface thereof. The ridge of knurls is adapted to frictionally engage the collet when the first tubular and the second tubular are assembled.

Abstract: A slide block mechanism for a semi-automatic pistol that locks the slide in battery and prevents the slide from reciprocating when the pistol is discharged. The slide block mechanism consists of a pair of aligned notches formed in the bottom edge of the slide and the top of the frame, and a pivoting slide block lever mounted to the frame that selectively seats within either of the aligned notches. The slide block lever can be manually switched to engage and disengage the slide block mechanism and is independent of the fire control and slide stop assemblies. The slide block lever has a protrusion that seats within the slide notch when engaged to prevent the slide from moving rearward and seats within the frame notch when disengaged for allowing normal operation of the slide.

Abstract: A tubular assembly for attaching accessories to gun barrels. The assembly includes a first tubular, including first interior threads on an interior surface thereof and a collet on a first end thereof. The assembly includes a second tubular, including first exterior threads on an exterior surface thereof. The first exterior threads mate with the first interior threads. The second tubular includes a ridge of knurls on the exterior surface thereof. The ridge of knurls is adapted to frictionally engage the collet when the first tubular and the second tubular are assembled.

Abstract: A slide block mechanism for a semi-automatic pistol that locks the slide in battery and prevents the slide from reciprocating when the pistol is discharged. The slide block mechanism consists of a pair of aligned notches formed in the bottom edge of the slide and the top of the frame, and a pivoting slide block lever mounted to the frame that selectively seats within either of the aligned notches. The slide block lever can be manually switched to engage and disengage the slide block mechanism and is independent of the fire control and slide stop assemblies. The slide block lever has a protrusion that seats within the slide notch when engaged to prevent the slide from moving rearward and seats within the frame notch when disengaged for allowing normal operation of the slide.

Abstract: A slide block mechanism for a semi-automatic pistol that locks the slide in battery and prevents the slide from reciprocating when the pistol is discharged. The slide block mechanism consists of a pair of aligned notches formed in the bottom edge of the slide and the top of the frame, and a pivoting slide block lever mounted to the frame that selectively seats within either of the aligned notches. The slide block lever can be manually switched to engage and disengage the slide block mechanism and is independent of the fire control and slide stop assemblies. The slide block lever has a protrusion that seats within the slide notch when engaged to prevent the slide from moving rearward and seats within the frame notch when disengaged for allowing normal operation of the slide.

Abstract: A slide block mechanism for a semi-automatic pistol that locks the slide in battery and prevents the slide from reciprocating when the pistol is discharged. The slide block mechanism consists of a pair of aligned notches formed in the bottom edge of the slide and the top of the frame, and a pivoting slide block lever mounted to the frame that selectively seats within either of the aligned notches. The slide block lever can be manually switched to engage and disengage the slide block mechanism and is independent of the fire control and slide stop assemblies. The slide block lever has a protrusion that seats within the slide notch when engaged to prevent the slide from moving rearward and seats within the frame notch when disengaged for allowing normal operation of the slide.

Abstract: An apparatus for use with a shotgun that includes an assembly having an interchangeable choke and compensator, and a lock nut for securing the compensator in a selected alignment with the choke. The current invention allows for shotguns, chokes, and compensators to be used interchangeably while still maintaining the correct positioning of each part relative to the others.