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Polymer-based cartridge casing for blank and subsonic ammunition

  • US 10,359,263 B2
  • Filed: 01/25/2019
  • Issued: 07/23/2019
  • Est. Priority Date: 01/14/2011
  • Status: Active Grant
First Claim
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1. A high strength polymer-based cartridge for subsonic ammunition comprising:

  • a first end having a mouth;

    a projectile disposed in the mouth;

    a shoulder, disposed below the mouth, forming a bottleneck cartridge;

    a wall, molded from a polymer, between the first end and a second end opposite the first end;

    an insert joined to the second end, comprising;

    an extraction rim and a groove both disposed at one end of the insert; and

    a primer pocket in fluid communication with a flash hole, the flash hole in fluid communication with a propellant chamber; and

    a sleeve section;

    wherein the sleeve section and the wall form the propellant chamber;

    wherein the sleeve section and the wall comprise a thickness at least 1.25 times greater than a standard thickness of a wall of a standard cartridge,wherein the propellant chamber between the mouth and the insert is unobstructed, andwherein the propellant chamber comprises a powder load having a load density greater than 40%.

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