NARROWING HIGH STRENGTH POLYMER-BASED CARTRIDGE CASING FOR BLANK AND SUBSONIC AMMUNITION

摘要

A high strength polymer-based cartridge casing includes an upper component of polymer, a bullet of a standard weight, a lower component of polymer, and an insert. The upper component has a shoulder portion and an upper component inner wall has a first diameter extending from the shoulder. The lower component has a lower component inner wall having a second diameter. The upper and lower component inner walls form a propellant chamber; and the first and second diameters reduce a volume of the propellant chamber. The reduced volume of the propellant chamber permits only enough propellant to propel a bullet engaged in the cartridge casing at subsonic speeds.

主权项

1. A high strength polymer-based cartridge for at least one of blank or subsonic ammunition comprising:
an upper component, molded from a polymer; a bullet, having a conventional weight for a caliber of the bullet, removably engaged with the upper component; a lower component, molded from a polymer, and engaged the upper component; an insert engaged to the lower component; a shoulder portion of the upper component; an upper component inner wall extending from the shoulder to the lower component and having a first diameter; a lower component inner wall extending from the upper component to the insert having a second diameter; and a linear slope disposed between the first diameter and the second diameter; wherein the upper and lower component inner walls form a propellant chamber;wherein the first diameter does not equal the second diameter; and
wherein the slope between the first and second diameters reduces a volume of the propellant chamber.