The T-34 is a Soviet medium tank that had a profound and lasting effect on the field of tank design. At its introduction, the T-34 possessed an unprecedented combination of firepower, mobility, protection and ruggedness. Its 76.2 mm (3 in) high-velocity tank gun provided a substantial increase in firepower over any of its contemporaries;[5] its well-sloped armour was difficult to penetrate by most contemporary anti-tank weapons. When first encountered in 1941, German general Paul Ludwig Ewald von Kleist called it "the finest tank in the world"[6] and Heinz Guderian affirmed the T-34's "vast superiority" over existing German armour of the period.[7][8] Although its armour and armament were surpassed later in the war, it has often been credited as the most effective, efficient and influential tank design of the Second World War.[9]
(wikipedia)

Credits to Sgtk for the SU-100 chassis and the gun.

And, don't ask me "why is the turret different?" you know, i cannot make realistic turrets so i make the fake one instead.