US Primer, Percussion, M36
The Primer, Percussion, M36, is standard for assembly in Cartridge Cases M21A1 and M21A1B1. It is the American type of primer with the anvil included. The primer consists of a brass primer cup, a strip brass anvil, a foiling paper cover, and a primer mixture of 2.1 grains. The primer is press fit into the cartridge case and is either staked with five equally spaced stab crimps, or is roll crimped in place.
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