| 主权项 |
1. A polymeric ammunition cartridge having a primer a diffuser cup comprising:
a substantially cylindrical insert comprising 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, a primer flash hole aperture positioned in the primer recess to extend through the bottom surface, and a flange that extends circumferentially about an outer edge of the top surface; a polymeric middle body component comprising a bullet-end component connection end opposite a polymeric coupling end that extends over the substantially cylindrical coupling element to cover the flange and into the primer flash hole to form a primer flash hole aperture; a bullet-end component comprising a middle body connection end opposite a bullet-end aperture, wherein the middle body connection end mates to the bullet-end component connection end to form a powder chamber between the bullet-end aperture and the substantially cylindrical insert; and a diffuser cup adapted to hold a primer comprising a cup bottom surface sized to fit in the primer recess, a diffuser aperture positioned through the diffuser bottom surface and aligned with the primer flash hole aperture, a cup wall attached to the diffuser bottom surface and extending away from the diffuser bottom surface, and an interior cavity bordered by the cup wall and the diffuser bottom surface and sized to frictionally fit the primer. |
