The 155 mm gun motor carriage M12 was a U.S. self-propelled gun developed during World War II. It mounted a 155 mm gun derived from the French Canon de 155 mm GPF field gun. The idea for the M12 was first proposed in 1941 and the pilot - T6 GMC - built and tested in early 1942.

The first heavy US SPG of WW2 The 155 mm Gun Motor Carriage M12 was a U.S. self-propelled gun mounting a 155 mm (6.1 inches) gun, derived from the French Canon de 155mm GPF field gun.

Feb 5, 2016 · The M12 was given the nickname “Doorknocker” by the troops because of the ability to punch through seven feet of concrete even when firing from 2,000 yards! “King Kong” was also a favorite nickname with the American operators of the …

The M12 SPG performed well during the last stages of WWII. It was a powerful counterpart to divisional artillery, which could complete a large spectrum of objectives, from isolating a section of the battlefield to destroying fortifications.

May 21, 2018 · One such project became the "M12 Gun Motor Carriage", a tracked, self-propelled gun (SPG) platform mounting a massive 155mm gun barrel and mated to the chassis of the existing M3 General Grant/General Lee Medium Tank.

The 155 mm Gun Motor Carriage M12 was a U.S. self-propelled gun developed during the Second World War. Only 100 were built; 60 in 1942 and a further 40 in 1943. It mounted a 155 mm gun M1917, M1917A1 or M1918 M1, depending upon availability, a weapon derived from the nearly identical French...

Sources show that the M12 Self Propelled Gun was fielded by six battalions from 1942 through 1945 before being disbanded after the war: 174th, 258th*, 557th, 558th, 987th and 991st Field Artillery Battalions. All six battalions served in the European Theater of Operations.

Early in the World War II, the Ordnance Department developed the 155mm Gun Motor Carriage, M12, using the World War French type 155m GPF, which had a maximum range of 20,100 yards, on an M3...

The M12 Gun Motor Carriage was a self-propelled artillery vehicle developed by the United States during World War II. It was constructed on the chassis of the M3 Grant tank, with extensive modifications to accommodate its primary armament—a 155mm gun derived from the French Canon de 155mm GPF field gun. The M12 entered service in 1942, initially being used for training purposes. It was ...

Apr 22, 2014 · The M12 155mm Gun Motor Carriage was one of the heaviest self-propelled guns to see service with the American Army during the Second World War, but its development was delayed by Army Ground Forces, the command responsible for developing the army in …