The T-34 is know as the best tank of World War Two. However, the 76mm gun wich be used on the first variants, is not strong enough against the German heavy tanks like the Tiger. Therefore in 1943, the Soviets replace the gun with a longer 57mm ZiS-4 L/73 high-velocity gun, with (ingame) a TMFD gunsight. The ZiS-4 was a tank gun version of the ZiS-2 . In 1941, trying to improve the anti-tank performance of the T-34 tank, members of the Morozov Design Bureau experimentally equipped it with the ZiS-4. Only a small number of these T-34-57 tanks were built and used as tank hunters. The calibre was smaller, but this gun had better penetration than the 76.2 mm F-34 (140 mm of steel at 500 m, as opposed to 90 mm). However, the small HE projectile was inadequate for use against unarmored targets.