M320 memiliki tiga bagian utama: peluncur granat dengan laras senapan, Penglihatan Siang/Malam (DNS) yang diproduksi oleh [[Insight Technology]], Inc, dan Laser Range Finder (LRF) genggam. Beberapa manfaatnya adalah:
* The M320 candapat bedigunakan useddengan indua two wayscara. It can be attachedDapat todipasang thepada [[M16 rifle|M16]] [[assault rifle]], [[CAR-15|CAR-15 carbine]], [[M4 carbine]], [[Heckler & Koch HK416|HK416] ], oratau otherjenis typessenapan of rifleslainnya, attachingdipasang underdi thebawah [[BarrelBarel (firearmssenjata api)|barrelbarel]] forwarddi of thedepan [[MagazineMajalah (firearmssenjata api)|magazinemajalah]], oratau itdapat candigunakan bediturunkan useddengan dismountedpopor withterpasang asebagai stockdudukan attachedyang asberdiri a stand-alonesendiri model.<ref name="Heckler & Koch M320 GLM (HK AG36) 40mm Single-Shot Under-Barrel Grenade Launcher (UBGL) (2010)" /> 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).
* The Day/Night Sight allows the grenadier to effectively engage the enemy in the dark.
