Provided is a fast cycling/low recoil pistol caliber carbine assembly. The carbine assembly may include an upper receiver, a lower receiver, a feed ramp, a bolt stop, a magazine, a control mechanism comprising a control lever, a control base, a control pivot pin, and a control spring, an ejector, a gap filler member. The assembly provides last round bolt hold open, trigger finger actuated bolt release, short stroke cycle, barrel ramp, ambidextrous magazine release, and uses Glock magazines.

An interchangeable element attachment system, including at least some of a bolt catch, wherein an attachment aperture is formed through a portion of an upper button portion of the bolt catch; an assist lever, wherein one or more attachment aperture engaging projections extend from a portion of an assist lever second side, within an attachment portion of the assist lever, wherein a portion of the attachment aperture engaging projection is received within at least a portion of the attachment aperture of the bolt catch, such that one or more portions of the attachment aperture engaging projection are abutted against one or more corresponding portions of the attachment aperture, and wherein an at least partially internally threaded fastener recess extends within the attachment portion; and a fastener positionable through the aligned attachment aperture and fastener recess to assist in attaching or coupling the assist lever to the bolt catch.

An interchangeable element attachment system, including at least some of a bolt catch, wherein an attachment aperture is formed through a portion of an upper button portion of the bolt catch; an assist lever, wherein one or more attachment aperture engaging projections extend from a portion of an assist lever second side, within an attachment portion of the assist lever, wherein a portion of the attachment aperture engaging projection is received within at least a portion of the attachment aperture of the bolt catch, such that one or more portions of the attachment aperture engaging projection are abutted against one or more corresponding portions of the attachment aperture, and wherein an at least partially internally threaded fastener recess extends within the attachment portion; and a fastener positionable through the aligned attachment aperture and fastener recess to assist in attaching or coupling the assist lever to the bolt catch.

An ammunition magazine includes a self-locking mechanism configured to prevent the magazine from being removed from a firearm without disassembly of the firearm action.

In some embodiments, a monolithic extended bolt release (EBR) for a rifle includes a rifle mount including a pin aperture for securing the EBR to the rifle case/housing, a bolt stop plate integrally formed with the rifle mount for stopping the rifle bolt, and an extension arm integrally formed with the rifle mount and bolt stop plate. The extension arm includes a vertical straight arm extending from the rifle-mounting part to a trigger opening when the EBR is mounted on a rifle, and a horizontal straight arm connected to the vertical straight arm and passing through the trigger opening. A right-handed rifle user can release the bolt by pressing with finger(s) on the EBR on the right of the rifle, pivoting the EBR about the mounting pin, lowering a bolt stop plate of the EBR and allowing release of the bolt and reloading of the rifle. The EBR design displays superior reliability over extended periods of use in harsh conditions.

In some embodiments, a monolithic extended bolt release (EBR) for a rifle includes a rifle mount including a pin aperture for securing the EBR to the rifle case/housing, a bolt stop plate integrally formed with the rifle mount for stopping the rifle bolt, and an extension arm integrally formed with the rifle mount and bolt stop plate. The extension arm includes a vertical straight arm extending from the rifle-mounting part to a trigger opening when the EBR is mounted on a rifle, and a horizontal straight arm connected to the vertical straight arm and passing through the trigger opening. A right-handed rifle user can release the bolt by pressing with finger(s) on the EBR on the right of the rifle, pivoting the EBR about the mounting pin, lowering a bolt stop plate of the EBR and allowing release of the bolt and reloading of the rifle. The EBR design displays superior reliability over extended periods of use in harsh conditions.

A firearm, especially a pistol, having a receiver and a guide rail for a slide that has a barrel, a retaining spring, and a slide stop device, the firearm further including a disassembling lever that is rotatable in the receiver, configured so that when the lever is in one end position: a) an abutment of the slide abuts against the lever and cannot be moved further forward, b) a fully inserted magazine is in contact with the lever and prevents any rotation, and c) an upper surface of the lever lies opposite an edge of the slide.

When the magazine is withdrawn and the slide is stopped by the slide stop device, the lever can be rotated to allow the forward movement of the receiver.

Pistols have a frame, a firing facility operable to discharge the pistol, a safety device connected to the frame and having a safe condition in which discharge is disabled and an operable condition in which discharge is enabled, an actuator responsive to the presence of a safety-indicating element and operative to control the condition of the safety device such that the safety device is in the safe condition when the safety-indicating element is absent and in the operable condition when the safety-indicating element is present, a selector connected to the frame and operably connected to the safety device, and the selector being movable between an enabled position in which the safety device is operably responsive to the presence and absence of the safety-indicating element, and a disabled position in which the safety device remains in the operable condition irrespective of the presence and absence of the safety-indicating element.

Pistols have a frame, a firing facility operable to discharge the pistol, a safety device connected to the frame and having a safe condition in which discharge is disabled and an operable condition in which discharge is enabled, an actuator responsive to the presence of a safety-indicating element and operative to control the condition of the safety device such that the safety device is in the safe condition when the safety-indicating element is absent and in the operable condition when the safety-indicating element is present, a selector connected to the frame and operably connected to the safety device, and the selector being movable between an enabled position in which the safety device is operably responsive to the presence and absence of the safety-indicating element, and a disabled position in which the safety device remains in the operable condition irrespective of the presence and absence of the safety-indicating element.

An apparatus and method for creating the apparatus that holds a bolt open after a last round is fired from a magazine is disclosed. A lower receiver may include at least two cavities. A transfer bar may be configured to fit into a first cavity of the at least two cavities. A hold down may be configured to fit into a second cavity of the at least two cavities. At least a portion of the hold down may be configured to overlap with at least a portion of the transfer bar to hold the transfer bar in place. The transfer bar, when a final round is fired from a magazine in the lower receiver, may be pushed up by a bump in the magazine to transfer upward movement to the transfer bar that catches a bolt and holds the bolt open until activation of a release button.