SU-76M Self Propelled Gun
The design work of SU-76 had begun in November 1942. The base of light tank T-70 was chosen for mounting 76.2mm ZiS-3 gun. However it was too short for good gun mounting and it was lengthened. The roof of the battle compartment was removed for better gun servicing. This modification, called SU-76M, was relaunched in mass production in early 1943 with 13,932 produced.