One embodiment of the present invention provides a polymeric ammunition having a metal injection molded primer insert.

One embodiment of the present invention provides a polymeric ammunition cartridge and methods of making and using the same. The cartridge includes a substantially cylindrical insert connected to a substantially cylindrical polymeric middle body. The substantially cylindrical insert includes a top surface opposite a bottom surface and a substantially cylindrical coupling element that extends from the bottom surface, a primer recess in the top surface that extends toward the bottom surface, and a flange that extends circumferentially about an outer edge of the top surface. The substantially cylindrical polymeric middle body includes a substantially cylindrical polymeric bullet-end and a substantially cylindrical polymeric coupling end connected by a powder chamber, wherein the substantially cylindrical polymeric coupling end contacts the substantially cylindrical coupling element.

The present invention provides a polymer nose for a polymeric ammunition cartridge having a generally cylindrical neck having a projectile aperture at a first end, a shoulder comprising a shoulder top connected to the generally cylindrical neck opposite a shoulder bottom, a nose junction positioned around the shoulder bottom, a skirt connected circumferentially about the nose junction to extend away from the shoulder bottom, wherein the nose junction and the skirt are adapted to mate to a base junction in a cartridge.

The present invention provides a primer insert for use in a polymeric ammunition cartridge includes a top surface opposite a bottom surface and a extraction flange that extends circumferentially about an outer edge of the top surface; a coupling element that extends from the bottom surface, wherein the substantially cylindrical coupling element is adapted to receive a polymer overmolding; a primer recess in the top surface that extends toward the bottom surface, wherein the primer recess comprises a recess bottom and a circular recess side wall; a primer flash aperture through the recess bottom that extends through the bottom surface, wherein the primer flash aperture is adapted to receive a polymer overmolding to form a flash hole; and a groove in the primer recess positioned around the primer flash aperture adapted to receive a polymer overmolding, wherein the groove extends at least partially over the bottom surface and at least partially over the circular recess side wall and the groove is adapted to receive polymer over the bottom surface and at least partially over the circular recess side wall.

Ammunition for a conductive energy weapon. A receptacle includes a cavity accessible through each of a first opening in a first face of the receptacle, a second opening in the first face of the receptacle, a third opening in a second face of the receptacle and a fourth opening in a third face of the receptacle. A propellant unit is included within the cavity proximate the second opening and a projectile is included within the cavity proximate the second opening. A housing is coupled to at least the second face and the third face of the receptacle and is further configured to couple to the conductive energy weapon. The propellant unit releases a propellant into the cavity, in a direction substantially opposite the projectile's direction of flight, in response to a trigger pull of the conductive energy weapon, and the cavity directs the propellant in the projectile's direction of flight.

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 equals approximately 15-33% of Tc, Tb is greater than or equal to Tp, and Tc is a function of a loaded projectile.

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 equals approximately 15-33% of Tc, Tb is greater than or equal to Tp, and Tc is a function of a loaded projectile.

The present invention provides a primer insert for a polymer ammunition cartridge having a top surface; a bottom surface opposite the top surface; a coupling element that extends from the bottom surface, wherein the coupling element comprises an interior surface and an exterior surface, wherein the interior surface comprises: a convex transition region that transitions from the bottom surface to a second segment wherein the transition region has an overall convex shape; a first segment extending from the second segment and terminates at a tip, wherein the first segment has a first segment distance from 0.05 to 0.09 inches and the second segment has a second segment distance from 0.05 to 0.09 inches, wherein the second segment has a second segment angle from +3 to −3 degrees relative to the first segment angle and the first segment has a first segment angle from +6 to −6 degrees from perpendicular to the top surface; a primer recess in the top surface that extends toward the bottom surface; a primer flash aperture positioned in the primer recess through the bottom surface; and a flash aperture groove in the primer recess and positioned around the primer flash aperture and adapted to receive a polymer overmolding through the primer flash aperture.

The present invention provides a multi piece primer insert for ammunition comprising: an upper primer insert portion comprising an upper primer aperture through an upper primer bottom surface; a substantially cylindrical coupling element extending away from the upper primer bottom surface, and an interior surface; a lower primer insert portion comprising a lower primer bottom surface opposite a lower primer top surface, a primer recess in the lower primer top surface adapted to fit a primer, a lower primer aperture through the lower primer bottom surface, and a flange that adapted to receive a polymer overmolding extends circumferentially about an outer edge of the lower primer top surface; and an insert joint that links the upper primer bottom surface and the lower primer bottom surface to form a primer insert.

The present invention provides a primer insert for a polymer ammunition cartridge comprising: a top surface; a bottom surface opposite the top surface; a coupling element that extends from the bottom surface, wherein the coupling element comprises an interior surface and an exterior surface, wherein the interior surface comprises: a convex transition region that transitions from the bottom surface to a second segment wherein the transition region has an overall convex shape; a first segment extending from the second segment and terminates at a tip, wherein the first segment has a first segment distance from 0.02 to 0.18 inches and the second segment has a second segment distance from 0.02 to 0.18 inches, wherein the second segment has a second segment angle from +3 to −3 degrees relative to the first segment angle and the first segment has a first segment angle from +6 to −6 degrees from perpendicular to the top surface; a primer recess in the top surface that extends toward the bottom surface; a primer flash aperture positioned in the primer recess through the bottom surface; and a flash aperture groove in the primer recess and positioned around the primer flash aperture and adapted to receive a polymer overmolding through the primer flash aperture.