Jan 27, 2026
A receiver blank includes a receiver body with a magazine well and an insert. The insert is located internal to the receiver body, and the insert is manufactured before the receiver body. The insert must be removed from the receiver body to convert the receiver blank to a firearm receiver.
Jan 27, 2026
A high strength polymer-based cartridge has a polymer case with a mouth, a neck, a shoulder below the neck, and a body below the shoulder and having a case thickness (Tc). The body has a flat portion comprising a pull thickness (Tp), and a dip, closer to the shoulder than the flat portion and comprising a dip thickness (Tb). The cartridge can also include an insert attached to the polymer case opposite the shoulder. The insert can have a flat section contacting the flat portion and comprising an insert wall thickness (Ti), and a bulge engaging the dip to maintain the insert on the polymer case. Tc, Tp, Tb, and Ti are related by Tp+Tb+Ti=Tc. These variables also have ranges where Tp is at least 0.010 inches in thickness, Tb is greater than or equal to Tp, and Tc is a function of a loaded projectile.
Nov 4, 2025
Provided is a polymer jacketed projectile with metal core. The projectile includes a metal bullet core and a monolithic polymer bullet jacket surrounding a portion of the bullet core. The jacket includes a series of radial driving bands cut into the jacket in a graduated configuration at increasing thicknesses. The graduation and increasing thickness of the driving bands allows gradual radial acceleration upon engraving of the rifling due to intentional radial deformation of the forward driving bands. Additionally, the bullet core) includes high-friction surfaces formed in a longitudinal direction or at a base of the bullet core. The modified surface increases friction between the bullet core and polymer, further decreasing radial slippage.
Oct 14, 2025
A method of manufacturing a casing for an ammunition cartridge includes injection molding a first polymer forming a first part of the casing. The first part is cylindrically shaped along a longitudinal axis extending from a projectile end opposite a stepped end. The stepped end forms a first end of a mechanical connection. A portion of the injection mold is removed and an additional injection mold is disposed about the stepped end of the first end of the first part and a second polymer injected forms a second part of the casing. The second part includes a second stepped end forming a second end of the mechanical connection. The first and second end are mechanically locked together preventing a separation of the first part from the second part. A thermal swagging tool forms a conical tapered region along the projectile end of the first part.
Sep 9, 2025
A high strength polymer-based blank cartridge having a first end; a shoulder disposed approximate the first end; a second end opposite the first end; and an insert engaged to the second end. A metal sleeve extends between the shoulder and insert, and a polymer sheath covers at least the metal sleeve. A propellant chamber is formed between the shoulder and the insert by at least the metal sleeve, and the propellant chamber has an unobstructed and a reduced volume, wherein the reduced volume is reduced in comparison to a propellant chamber of a standard cartridge.
Aug 5, 2025
A method is disclosed for coating a projectile for use in an ammunition cartridge. A polymer jacket is applied to an undersized projectile core of a first standard caliber to bring the outer dimensions of the jacketed projectile into compliance with those of a second, larger caliber projectile. The polymer jacket coating may produce a non-uniform outer diameter of the polymer jacketed projectile and may include a plurality of circular cavities defined therein. The polymer-jacketed projectile may be a bullet for pistol or rifle ammunition, or a pellet, or shot for use in a shotgun shell.
