The main production variant of the "Ram" Canadian medium cruiser tank equipped with the 57-mm QF 6 pounder gun. Developed on the basis of the M3 Lee medium tank in 1941. A total of 1,899 vehicles were produced before 1943. None of them were ever used in action, although Canadian and British forces used them for training purposes. In addition, the tank was often used as a basis for various SPGs and special-purpose vehicles.