A new version of the M3 was developed using twin Cadillac automobile engines instead of the radial aero-engines. This allowed for more room in the fighting compartment and allowed for a better turret basket. The new model, designated as the M5_, also featured a redesigned hull with sloped glacis plate and driver's hatches moved to the top. Even though the main gripe about the M3 was the underpowered 37mm gun, the improved M5_ series kept the same 37mm gun. The M5_ gradually replaced the M3 in production from 1942 and was in turn succeeded by the Light Tank M24 in 1944. 2074 M5_s were built during WWII.