Its higher capacity gives it an advantage over single-shot launchers, and is much smaller and lighter than traditional multiple grenade launchers such as the M32 MGL. It uses the superposed load system where multiple projectiles are loaded nose to tail in a single gun barrel with propellant packed in between.
— Battlelog description
Despite the additional ammunition, all three rounds are needed to kill an enemy from full health (excepting use of the FLAK specialization). Direct hits inflict less damage, the reduction in blast effects being worse than the gain in impact damage.
It cannot destroy walls without using up most of its base ammo, taking out only the thinnest layers of cover with one shot, making it much less useful for this purpose than the M320.
- The 3GL uses the same model as the M320, including the same reload animation (consisting of a single grenade) and firing sound.