Assault Gun

An assault gun is a gun or howitzer mounted on a motor vehicle or armored chassis, designed for use in the direct fire role in support of infantry when attacking other infantry or fortified positions.

Historically the custom-built fully armored assault guns usually mounted the gun or howitzer in a fully enclosed casemate on a tank chassis. The use of a casemate instead of a gun turret limited these weapons field of fire, but allowed a larger gun to be fitted relative to the chassis, more armour to be fitted for the same weight, and provided a cheaper construction. The increased space and reduced weight of the turretless design also allowed for the mounting of a larger weapon and heavier frontal armour on any given chassis. In most cases, these turretless vehicles also presented a lower profile as a target for the enemy.