M12 Gun Motor Carriage

Although only 100 examples were produced, the 155mm Gun Motor Carriage M12 served with distinction as an infantry—support weapon and in particular as a bunker—buster during the U.S. assault on the Siegfried Line in the winter of 1944—45.

The ability to rapidly ready heavy artillery for firing lead to the development of the M12 155mm gun in 1941, based on the M3 Medium Tank chassis. The trial vehicle, built by Rock Island Arsenal, was designated T6. To accommodate the large, rear mounted weap...