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Method of making a primer insert for use in polymer ammunition

  • US 10,345,088 B2
  • Filed: 05/14/2018
  • Issued: 07/09/2019
  • Est. Priority Date: 11/10/2010
  • Status: Active Grant
First Claim
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1. An injection molded primer insert for polymer ammunition comprising:

  • a top surface opposite a bottom surface;

    a substantially cylindrical coupling element extending away from the bottom surface forming an interior surface inside the substantially cylindrical coupling element;

    a primer recess in the top surface that extends toward the bottom surface;

    a primer flash aperture positioned in the primer recess to extend through the bottom surface;

    a flash hole groove positioned in the primer recess and extends around the primer flash aperture, wherein the flash hole groove is adapted to receive a polymer overmolding; and

    a flange that extends circumferentially about an outer edge of the top surface.

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