M320 grenade launcher Country Germany Type Grenade launcher Manufacturer Heckler & Koch Introduction 2006 Specifications Weight 1.5 kg (3.3 lb) Length 350 mm (13.7 in.) Barrel length 280 mm (11 in.) Crew 1 Cartridge 40x46 mm low velocity grenade Action Single shot, double action Rate of fire 5 to 7 rounds per minute Muzzle velocity 76 m/s Effective range 150 m Maximum range 400 m Feed system Single shot

M320 Grenade Launcher Module (GLM) is the US Military designation for a new single-shot 40 mm grenade launcher system to replace the M203. Product Manager Individual Weapons (US Army) at Picatinny Arsenal conducted a competitive bidding process for a new 40mm grenade launching system, Heckler & Koch was awarded a contract to provide the XM320 beginning in 2006. The M320 was developed from but is not identical to the Heckler & Koch AG36. The M320 is expected to enter full production in November 2008.