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Weighing in at 35 tons, here's the M4A3 Medium battle tank we visited. Hull number 117-42, it's one of 1,690 units built by Ford from the autumn of 1942 into late 1943. While Sherman tanks were made by several manufacturers and powered by different types of engines, the Ford Sherman tanks all had the Ford built GA-8 engine. That's a 75mm gun in the main turret, while up front a separate gunner would operate a 50-caliber machine gun mounted in a ball-type turret.