M103A2 Heavy Tank
Introduced in 1957, the M103 was designed to take on Soviet heavy tanks such as the later IS and T-10 models if World War III followed a conventional war. It was armd with a 120mm M58 gun and two 0.3 cal M1919A4E1 machine guns. The M103 served in Europe in a heavy tank battalion although never saw combat. By 1963 they were replaced in the Army by the M60 Main Battle Tank and in the Marines by 1973.
The M103A2 was produced in 1964 from 153 converted M103 with a 750hp diesel engine.