of the Sherman were armed with a 76 mm gun or a 105 mm howitzer. On the Sherman hull, the M10 and M36 tank destroyers (officially called "Gun Motor Carriages") were produced. The M7 Howitzer Motor Carriage was originally built on the M3 medium tank chassis, but later versions were built on the similar M4 tank chassis. Notes: M2A1 = Medium M2A1 M3 = Medium M3 Lee/Grant. The US version in British service was the Lee (named after General Lee); the British specification version (a different turret) was the Grant (named after General Grant). M4 = Medium M4 Sherman with 75 mm M3 (L/38) gun M4 (76) = Medium M4 Sherman with 76 mm M1-series gun M4 (105) = Medium M4 Sherman with 105 mm howitzer M10 GMC = M10 Gun Motor Carriage with 3" M7 gun M36 GMC = M36 Gun Motor Carriage with 90 mm M1 gun M7 HMC = M7 Howitzer Motor Carriage, M3 (Grant) or M4 (Sherman) hull with 105 mm howitzer in forward-facing mount. Given the service name "Priest" by the British. M12 GMC = M12 Gun Motor Carriage, M3 (Grant) hull with 155 mm M1918 gun in forward-facing mount M30 Cargo Carrier, ammunition carrier for M12 GMC. Heavy tanks The Pershing heavy tank (named after General Pershing) was the only heavy tank used in combat by the US armed forces during World War II. An earlier design, the Heavy Tank M6, was not accepted for large scale production and only 40 were produced. Work began in early 1945 to develop a significantly heavier variant of the M26 Pershing, the T32 Heavy Tank, but after the end of the World War II, the project was cancelled and the four prototype vehicles were scrapped. All types and derivatives See also Other countries' production figures British armoured fighting vehicle production during World War II French armoured fighting vehicle production during World War II German armored fighting vehicle production during World War II Soviet armored fighting vehicle production during World War II United States aircraft production during World War II References World War II armoured fighting vehicle production Military history of the United States during World War II United States Army in World War II