The self-propelled weapon GMC M12 was in fact utilized through Second World War by the U.S. Army. It was developed on hull about the M3 Lee / give tank on which ended up being setup the original French GPF 155 mm weapon. The key armament, the ammunitions additionally the weapon team was indeed positioned in an open topped area behind the vehicle. Simply the motorist's and also the radio operator’s seats was in fact protected. To soak up the outcome the recoil with all the artillery piece, the M-12 was fashioned with a rear blade which was lowered and fixed in the ground.