The M320 is based on the earlier Heckler & Koch AG-C, but with some Army-specific modifications. The M320 with electronic targeting system mounted on the M4 carbine. The Day/Night Sight allows the grenadier to effectively engage the enemy in the dark.A grenadier carrying an M320 with an M4 and three dozen 40 mm grenades will have a total weapon load of 38 lb (17 kg). It can be attached to the M16 assault rifle, CAR-15 carbine, M4 carbine, HK416, or other types of rifles, attaching under the barrel forward of the magazine, or it can be used dismounted with a stock attached as a stand-alone model. The M320 has three major parts: a grenade launcher with rifled barrel, Day/Night Sight (DNS) produced by Insight Technology, Inc and a hand held Laser Range Finder (LRF). Following initial experiments, the Marines expect to issue 7,000 launchers between 20. In June 2017, Bravo Company, 2nd Combat Engineer Battalion became the first U.S. The weapon was officially fielded in July 2009 at Fort Bragg by the 1st Brigade Combat Team, 82nd Airborne Division. The M320 entered production in November 2008.įielding of the M320 was planned to begin in February 2009, with 71,600 GLMs planned to phase out the M203 by 2015.

The M320 was developed from but is not identical to the Heckler & Koch AG36 (a key distinguishing feature being the addition of a folding foregrip ahead of the trigger for use when the weapon is in stand-alone configuration, a feature the AG36 lacks). Army at Picatinny Arsenal conducted a competitive bidding process for a new 40 mm grenade launching system, Heckler & Koch was awarded a contract to provide the XM320 beginning in 2006. Heckler & Koch's submission was selected in May 2005. It had to be able to fire all 40 mm low-velocity grenades, but be loaded from the breech to accept future longer projectiles. It had to be more reliable, ergonomic, accurate, and safer than the M203. In 2004, the Army announced a requirement for a commercial off-the-shelf 40 mm grenade launcher.

M32 grenade launcher types