M320

For the prototype version see XM320 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, M16 or M416 family of rifles, it is a variant of the AG-36 grenade launcher used on the L85A2 and G36 assault rifles.

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 a crater near 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 player's 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 and M26 MASS.

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. The leaf sights may disappear due to a rare glitch.

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.

Battlefield 3: Close Quarters
The M320 LVG was added in the Close Quarters DLC. This version of the grenade launcher fires a 40mm LVG projectile which detonates after approximately 3 seconds, and is otherwise comparable to an M67 hand grenade. Unlike the 40mm Smoke, the projectile does not deal any damage upon direct impact with an enemy. Any kills with this weapon are added to your total number of frag grenade kills.

Battlefield 4
The M320 appears in the Battlefield 4 Gameplay Reveal Trailer as a weapon given to Recker by Irish in order to take out the crew of an Mi-28 Havoc chasing their SUV. The M320 uses the same model used in Battlefield 3, and is supposedley a placeholder for an updated M320 model.

Trivia

 * When a soldier fires the M320, they will shout out a random grenade voice clip such as, "Throwing grenade!"
 * The proficiency dog tag shows the XM320 used in previous games.
 * When equipped standalone with an AEK-971 and MP-412 REX it will lose its iron sights.