M55 self-propelled howitzer

The M55 is an American fully enclosed and armored self-propelled howitzer based on the M53 155 mm (6.1 in) self-propelled gun and with components taken from the M47 Patton. == Description == It has a 203 mm (8 in) howitzer which can traverse 30° left or right, carrying 10 rounds of ammunition when fully combat loaded.