M-32 Automatic Grenade Launcher

M-32 Automatic Grenade Launcher is grenade launcher. The auto-GL is a tripod- or vehicle-mounted weapon that spits out grenades at a ferocious rate of fire. It has all but replaced the old 60mm mortar (the new 60mm mortar is coming close to replacing the old 81 mm mortar) as a fire-support weapon. It can use normal 40mm grenades, but only in single-shot mode. Normal 40mm grenade launchers cannot use the high-velocity grenades used in the auto-GL, since these high-velocity rounds are half again the length of a normal 40mm grenade.

Source

 * Home of the Brave, pg.84
 * Blackhand's Street Weapons, pg.35