40 mm low drag extended range projectile

摘要

A 40 mm ammunition projectile for firing without significant spin in an M203 or an M320 grenade launcher. The ammunition includes a projectile body having hollow inner cavity therein for an explosive warhead; a projectile fin assembly; a projectile nose element having a conically shaped front area thereon; a decoupled projectile sabot in two or more joining sabot petals enclosing the body; a base cartridge case having vent holes, a bowl area for placement of a copper closure cup containing propellant therein, and a closure plug for threading into the rear of said cartridge case. The projectile fin assembly may provide a canted angle on each fin blade to (relatively very slowly) spin up the round at less than 30 Hz. Projectiles with body length less than five inches may be launched in an M203 grenade launcher while projectiles with body length up to eight inches may be launched in an M320 grenade launcher.

主权项

1. A 40 mm ammunition projectile for firing without significant spin in an M203 or an M320 grenade launcher, the projectile comprising:
a projectile cup; a cylinder shaped spacer surrounded by a ring shaped spacer, wherein the cylinder shaped spacer and the ring shaped spacer are disposed inside the projectile cup an obturator; a projectile body having hollow inner cavity; a projectile fin assembly; a projectile nose element having a conically shaped front area thereon; an explosive payload loaded in cavity of said projectile body; a projectile sabot enclosing said body, said sabot comprising two or more joining sabot petals; a break ring; a cartridge case; vent holes in said cartridge case; copper closure cup for placement in a bowl area of said cartridge case, said copper closure cup containing propellant, and; a closure plug for threading into the rear of said cartridge case.