Infantry support guns are designed to provide direct organic support for infantry forces. They fire a range of shells, primarily in a direct fire mode.
Most towed infantry guns are lightweight and capable of being manhandled for limited mobility to accompany infantry.
A self-propelled infantry gun (assault gun) is an armored gun-armed vehicle designed to provide direct fire support for infantry and armored forces. Typically, the gun is mounted in the hull and the front of the vehicle is heavily armored.