The M36 GMC is an American-made self-propelled anti tank gun. Developed in mid-1942, it was first used in combat on the Western Front in 1944. There were several modifications that differed in the chassis used. The second production series, the M36B1, used the M4A3 tank's hull as its base. After World War II, the M36 GMC was exported to many U.S. allied countries. For instance, Italy received 36 M36B1 vehicles after joining NATO in 1949. The vehicles were used to reinforce approximately six tank battalions.

The Italian M36B1 was introduced in Update 1.85 "Supersonic". Compared to the base M36 GMC, this modification features a more robust hull, an upgraded gun with better armor penetration, and APCR (including the improved M332) and HEAT rounds in the ammunition loadout. Not only that, the main APCBC round, the M82, deals excellent post-penetration damage. But overall mobility of the vehicle is mediocre, especially reverse speed, and like all open-turret vehicles it is vulnerable to enemy aircraft and artillery.