OVERMOLDED HIGH STRENGTH POLYMER-BASED CARTRIDGE CASING FOR BLANK AND SUBSONIC AMMUNITION
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United States of America Patent
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Issued Date -
Aug 27, 2015
app pub date -
Mar 14, 2013
filing date -
Jan 14, 2011
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Abstract
A high strength polymer-based cartridge casing for blank or subsonic ammunition has a reduced volume and includes a mouth, a neck extending away from the mouth, and a shoulder extending below the neck. Additionally, the cartridge includes an extraction rim and a groove, a primer pocket and a flash hole in fluid communication with the reduced volume. An inner wall encloses the reduced volume. The mouth has a first diameter and the inner wall has a second diameter and the second diameter is approximately equal to the first diameter. Further, the neck, shoulder, rim, groove, and inner wall all comprise a polymer. Further, the inner wall can be a metallic sleeve overmolded by a polymer sheath. The reduced volume of the propellant chamber permits only enough propellant to propel a bullet engaged in the cartridge casing at subsonic speeds.
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