The M32 MGL is a grenade launcher that appears Spec Ops: The Line.
The M32 MGL first appears in Chapter 4: The Nest, but does not reappear until Chapter 10 B: Stealing Water when it is given to Walker by Riggs. It has one last appearance in Chapter 14: The Bridge, after taking the MG nest using the left flank, It is within the bunker, next to an M249 SAW. Due to its extreme rarity, ammo can only be gained from Ammo Crates and Executions.
It is unlocked at level 45. Making it the very last item to be unlock in the multiplayer. It is a heavy weapon and can only be equipped to a loadout by a Gunner.