Self-propelled installation created at the end of World War II for use in artillery units Reserve Command. Installation created on the basis of the tank M4A3E8 layout scheme which was in connection with this change. At the front of the case is Department of Management, which houses a driver and one of the crew members. Power pack is located behind the control compartment in the middle part of the body. The roof of the housing of the power pack are hatches for access to the units of the power plant and vozduhopritoki.