STAMPED PRIMER INSERT FOR USE IN POLYMER AMMUNITION
One embodiment of the present invention provides a stamped metal primer insert for a polymeric ammunition cartridge comprising: a top surface having a stamped flange that extends circumferentially about an outer edge of the top surface; a stamped coupling element that extends from the flange to a coupling tip; a stamped inner coupling element from the coupling tip to a bottom surface, wherein the bottom surface is opposite the top surface; a stamped primer recess in the top surface that extends toward the bottom surface; a primer flash aperture in the primer recess through the bottom surface; and a groove stamped in the primer recess around the primer flash aperture adapted to receive a polymer overmolding.
1 . A stamped metal primer insert for a polymeric ammunition cartridge comprising:
a top surface having a stamped flange that extends circumferentially about an outer edge of the top surface;
a stamped coupling element that extends from the flange to a coupling tip;
a stamped inner coupling element from the coupling tip to a bottom surface, wherein the bottom surface is opposite the top surface;
a stamped primer recess in the top surface that extends toward the bottom surface;
a primer flash aperture in the primer recess through the bottom surface; and
a groove stamped in the primer recess around the primer flash aperture adapted to receive a polymer overmolding.
2 . The insert of claim 1 , further comprising a texture applied to the stamped coupling element.
3 . The insert of claim 2 , wherein the texture comprises grooves, ridges, knurling, hatching, lines, free formed lines, free formed grooves, patterns or combinations thereof.
4 . The insert of claim 1 , further comprising a texture applied to the stamped inner coupling element.
5 . The insert of claim 4 , wherein the texture comprises grooves, ridges, knurling, hatching, lines, free formed lines, free formed grooves, patterns or combinations thereof.
6 . The insert of claim 1 , further comprising a texture applied to the stamped coupling element and the stamped inner coupling element.
7 . The insert of claim 1 , wherein the primer flash aperture is larger than a flash hole in a standard primer insert of the same caliber.
8 . The insert of claim 1 , wherein the primer flash aperture is larger than a flash hole in a standard primer insert of the same caliber to allow polymer overmolding into the primer flash aperture.
9 . The insert of claim 1 , wherein the metal primer insert is a 5.56 mm, 7.62 mm, 0.223, 308, 338, 3030, 3006, and 0.50 caliber primer insert.
10 . The insert of claim 1 , wherein the metal primer insert is a 380 caliber, 38 caliber, 9 mm, 10 mm, 20 mm, 25 mm, 30 mm, 40 mm, 45 caliber and the like.
11 . The insert of claim 1 , wherein the insert blank is a metal, an alloy, or a ceramic alloy.
12 . The insert of claim 1 , wherein the insert blank is stainless steel or brass.
13 . The insert of claim 1 , wherein the insert blank is a 102, 174, 201, 202, 300, 302, 303, 304, 308, 309, 316, 316L, 316Ti, 321, 405, 408, 409, 410, 415, 416, 416R, 420, 430, 439, 440, 446 or 601-665 grade stainless steel.
14 . The insert of claim 1 , wherein the insert blank is a Ti 6 Al 4 V.