Comparing: IS-3A vs. AMX 50 100

In 1956–1957, the Military Armored Forces Academy developed a speculative design for a new loading system on the IS-3 and T-10 heavy tanks. The IS-3 variant featured a double-row ammo rack with an automatic loading system. The crew was reduced to three members: commander, gunner, and driver. The turret was redesigned in order to accommodate the loading mechanism. The vehicle existed only in blueprints.

Development of this heavy tank started in 1945, and was influenced by German wartime tank designs. In 1950 a prototype with an oscillating turret and the 100 mm gun was manufactured. The vehicle never entered mass production nor saw service.