M10 Gun Motor Carriage

The M10 tank destroyer, formally known as the 3-inch gun motor carriage M10 or M10 GMC, was an American tank destroyer of World War II. After US entry into World War II and the formation of the Tank Destroyer Force, a suitable vehicle was needed to equip the new battalions. By November 1941, the Army requested a vehicle with a gun in a fully rotating turret after other interim models were criticized for being too poorly designed. The prototype of the M10 was conceived in early 1942 and delivered in April that year. After appropriate changes to the hull and turret were made, the modified version was selected for production in June 1942 as the "3-inch Gun Motor Carriage M10". It mounted the 3-inch (76.2 mm) gun M7 in a rotating turret on a modified M4 Sherman tank chassis.
It was built in two variants. The M10 GMC used the M4A2 Sherman chassis, and the M10A1 used the M4A3 chassis. Production of the two models ran from September 1942 to December 1943 and October 1942 to November 1943, respectively.
The M10 was numerically the most important U.S. tank destroyer of World War II. It combined thin but sloped armor with the M4's reliable drivetrain and a reasonably potent anti-tank gun mounted...