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.

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 …

May 5, 2019 · During the Second World War, self-propelled artillery played a vital role in bringing heavy firepower to bear, with greater mobility than drawn artillery and at a lower cost than building tanks. The United States fielded a wide range of self-propelled guns.

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. Developed from the 1941 prototype T6 GMC, tested in early 1942, the Ordnance Department obtained an order for 50 units, followed by 50 more in 1943, based on the ...

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...

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...

558th Field Artillery Battalion, U.S. Army, World War II M12 155mm Self Propelled Gun 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*, …

Oct 31, 2010 · Development on the 155 mm Gun Motor Carriage, M12 was started in June 1941. Production did not start until March 1942, however, as the US Army did not consider a self-propelled gun necessary at the time. It was equipped with a World War 1 field gun, which was removed from its carriage and mounted on a Medium Tank, M3 chassis.

The M12 Gun Motor Carriage was a self-propelled artillery piece that was used by the United States during World War II. The M12 had a 400 hp, gasoline powered, Continental R975-C1 engine that could propel the M12 at speeds of up to 38.6 km/h (24 mph).

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 …