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 restricted capacity firearm having an internal, integral ammunition chamber, and a method and device for converting an existing magazine fed firearm, such as an AR-15 semi-automatic rifle and/or semi-automatic pistol, into a restricted capacity firearm having an internal, integral ammunition, chamber are provided. In accordance therewith, the existing lower receiver of an AR-15 may be replaced with a new lower receiver having an internal, integral ammunition chamber. The new lower receiver may be configured so that the firearm may be opened using the existing pivot pin of the AR-15 to allow refilling of the ammunition chamber. Alternatively, the replacement lower receiver may be configured such that the internal, integral ammunition chamber can only be refilled by disassembling the firearm. A handheld semi-automatic pistol frame and slide embodiment may also be configured to contain an internal, integral ammunition chamber with limited capacity.

A restricted capacity firearm having an internal, integral ammunition chamber, and a method and device for converting an existing magazine fed firearm, such as an AR-15 semi-automatic rifle and/or semi-automatic pistol, into a restricted capacity firearm having an internal, integral ammunition, chamber are provided. In accordance therewith, the existing lower receiver of an AR-15 may be replaced with a new lower receiver having an internal, integral ammunition chamber. The new lower receiver may be configured so that the firearm may be opened using the existing pivot pin of the AR-15 to allow refilling of the ammunition chamber. Alternatively, the replacement lower receiver may be configured such that the internal, integral ammunition chamber can only be refilled by disassembling the firearm. A handheld semi-automatic pistol frame and slide embodiment may also be configured to contain an internal, integral ammunition chamber with limited capacity.

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.