Perhaps the most successful weapons programs involving polymer-cased ammo were launched in 2004 under the Army's Lightweight Small Arms Technology (LSAT), which resulted in successful tests of a special case-telescoped (CT) ammo in lightweight machine gun prototypes chambered for 5.56mm and 7.62mm, and a rifle prototype chambered 6.5mm CT ammo.
Textron has incorporated the CT technology developed in LSAT into the 6.8mm cartridge it designed for its Next Generation Squad Weapon prototypes. The technology relies completely on a plastic case to hold the propellant and the projectile.
While the commercial ammunition market may stick with brass, the U.S. military will eventually have to move toward polymer-cased ammo.
An ammunition design, in which, the projectile is partially or completely enveloped by the propellant.
An explosive that fires bullets from a firearm.
Propellants are burned or otherwise decomposed to produce the propellant gas.