The invention comprises various minimal modifications to the upper receiver assembly of an AR-platform semiautomatic firearm whereby the firearm is reversibly converted to a pump-action firearm. The modifications comprise a means to introduce a push rod which passes through the front end of the upper receiver and connects a pump hand grip and the bolt carrier group of the firearm. The pump hand grip is guided and supported by the barrel and by a secondary guide rail disposed above the barrel.

The invention comprises various minimal modifications to the upper receiver assembly of an AR-platform semiautomatic firearm whereby the firearm is reversibly converted to a pump-action firearm. The modifications comprise a means to introduce a push rod which passes through the front end of the upper receiver and connects a pump hand grip and the bolt carrier group of the firearm. The pump hand grip is guided and supported by the barrel and by a secondary guide rail disposed above the barrel.

An ammunition loading device for a firearm includes a body that is configured to be positioned within a magazine well of the firearm. The body has a cradle at a top surface for holding a single round of ammunition. The ammunition loading device further includes a bolt catch lifter positioned near the top surface of the body. The bolt catch lifter is configured to raise and lower a bolt catch mechanism of the firearm.

An ammunition loading device for a firearm includes a body that is configured to be positioned within a magazine well of the firearm. The body has a cradle at a top surface for holding a single round of ammunition. The ammunition loading device further includes a bolt catch lifter positioned near the top surface of the body. The bolt catch lifter is configured to raise and lower a bolt catch mechanism of the firearm.

A resetting magazine cut-off control system for a firearm includes a magazine and a control cuff that has a cuff cam surface and a cuff stop surface and is operable between a first position and a second position relative to the magazine. The system also includes an action member having a first portion and a second portion, with the second portion having an action stop surface. Contact between the cuff stop surface and the action stop surface prevents longitudinal movement of the action member when the control cuff is in the first position, and the first portion applies a force to the cuff cam surface, with the force moving the control cuff from the first to the second position, when the action stop surface is moved away from the cuff stop surface. The system allows a shooter to automatically switch between shooting modes by using the firearm's action.

A resetting magazine cut-off control system for a firearm includes a magazine and a control cuff that has a cuff cam surface and a cuff stop surface and is operable between a first position and a second position relative to the magazine. The system also includes an action member having a first portion and a second portion, with the second portion having an action stop surface. Contact between the cuff stop surface and the action stop surface prevents longitudinal movement of the action member when the control cuff is in the first position, and the first portion applies a force to the cuff cam surface, with the force moving the control cuff from the first to the second position, when the action stop surface is moved away from the cuff stop surface. The system allows a shooter to automatically switch between shooting modes by using the firearm's action.

A bolt-action conversion device includes a slide clamp having a longitudinal cavity, a first pin hole, and a receiver in a direction orthogonal to the longitudinal cavity and substantially adjacent to a forward end of the slide clamp. The device also includes a locking plate having a second pin hole. A body portion of the locking plate has a narrow dimension and a broad dimension relative to the narrow dimension. When the locking plate is inserted into the receiver of the slide clamp with the first pin hole and the second pin hole aligned, an opening is formed between an upper surface of the locking plate and an internal surface of the longitudinal internal cavity. The longitudinal cavity accepts a slide of a firearm such that the opening is aligned with the barrel and at least a portion of the locking plate is aligned with a frame.

A bolt-action conversion device includes a slide clamp having a longitudinal cavity, a first pin hole, and a receiver in a direction orthogonal to the longitudinal cavity and substantially adjacent to a forward end of the slide clamp. The device also includes a locking plate having a second pin hole. A body portion of the locking plate has a narrow dimension and a broad dimension relative to the narrow dimension. When the locking plate is inserted into the receiver of the slide clamp with the first pin hole and the second pin hole aligned, an opening is formed between an upper surface of the locking plate and an internal surface of the longitudinal internal cavity. The longitudinal cavity accepts a slide of a firearm such that the opening is aligned with the barrel and at least a portion of the locking plate is aligned with a frame.

A system facilitates one handed manipulation of a service pistol and includes a device having two components and related inserts that allow for single handed loading, cycling, firing, clearing and unloading of semi-automatic pistols. The present device includes a spine; and a retainer attached to the spine wherein the retainer comprises at least a first groove tapering from a first width towards the pivotal attachment between the cover and spine to a second width towards the front edge of the cover.

An ammunition loading device for a firearm includes a body that is configured to be positioned within a magazine well of the firearm. The body has a cradle at a top surface for holding a single round of ammunition. The ammunition loading device further includes a bolt catch lifter positioned near the top surface of the body. The bolt catch lifter is configured to raise and lower a bolt catch mechanism of the firearm.