SU-152 "Taran"
The Object 120 "Taran" was a fully enclosed Soviet tank destroyer built in 1965, which never progressed past the experimental stage.
History
In the early 1960s, the Soviet military concluded that the armor-piercing ammunition used by the T-55 medium tank, and the T-10 heavy tank was unable to penetrate the frontal armor of the newest American M60 and British Chieftain main battle tanks. The Soviets, therefore, began parallel research on several different anti-tank weapon systems, such as the development of new armour-piercing fin-stabilized discarding sabot and shaped charge ammunition for existing tank guns, new rifled and smoothbore tank guns with calibers ranging from 115 mm to 130 mm with anti-tank missiles.One of these projects became the Object 120 "Taran". The factory designation was Object 120. In terms of firepower and mobility, it surpassed all foreign tank destroyers. The main reason the Object 120 "Taran" wasn't adopted was due to the development and adoption of more effective 125 mm smoothbore tank gun and anti-tank missiles.