The M320 grenade launcher was the successor to the M203 grenade launcher, as well as its replacement in the United States Army. Like the M203, the M320 utilized 40mm explosive rounds, was a single shot launcher, and had the same High-Low Propulsion System. Unlike the M203, however, it came equipped with nightvision equipment and was double-barreled.
Drebin 893 sold several XM320 grenade launchers (the prototype stage) as a gun launderer. It carried four ammunition types: HE, smoke, stun, and WP.
In 2014, Pieuvre Armement, during their operations in South America, carried it as a standalone weapon.