M320

For the Russian underbarrel attachment which is added via selection of this equipment, see GP-30 The M320 is a limited-use grenade launcher being developed by Heckler & Koch to replace the M203 grenade launcher. It fires the same 40mm underbarrel grenades, but uses a breach-loading mechanism as opposed to the free-sliding barrel of the M203. The weapon can be used as either an underbarrel attachment on the M4, or the M16 family of rifles, or as a standalone grenade launcher. It is based upon, but not the same as, the AG-36.

Battlefield 3
The M320 is featured at only certain points during the campaign. During Operation Guillotine, one can be found near a dead marine in the canal just after mantling the wall. This weapon takes up a weapon slot, and is not mounted to any gun. On Rock and a Hard Place, an M320 is found attached to the players starting weapon, the M416.

The M320 is an Assault gadget in Battlefield 3's multiplayer. The M320 is an underbarrel attachment when the assault rifle's second slot is left empty (on the 'Underslung Rail' option), but is a standalone weapon when the second slot on the assault rifle is filled. The arc of the projectile is far more obtuse than in older games, allowing it to go farther more accurately.

Its blast radius is very small, such that one must land the grenade either on or just beside an enemy to gain a kill, limiting its anti-infantry properties. It also has only four rounds, though the player can very quickly replenish the ammunition with the use of a Support player's ammo bag. It can fire multiple ammunition types including standard 40mm grenades, but also specialty rounds such as flechette and smoke rounds.

The grenade launcher occupies the Gadget 1 slot, which is shared with the Medkit.

Unlike previous Battlefield grenade launchers, the leaf sights can be used if equipped as a separate weapon. The leaf sights do not appear to be accurate.

Note that if it is equipped alongside the AK-74M, AEK-971 or AN-94 with the Underslung Rail attachment, it will turn into a GP-30, though this is purely cosmetic and does not affect gameplay. If no underslung rail is attached, it will still be an M320.