 The service brakes were fitted to both output sides of the transmission.They consisted of Argus disk brakes of the type developed by , similar to those previously used in the German Tiger and Panther tanks.Parallel to the M 4, from 1946 AMX designed the "AMX Chasseur de Char", a lightly armoured 34 tonne tank destroyer based on the M 4 chassis, but fitted with a modern rounded sleek turret for the 90 mm gun.