The self-propelled mortar based on BTR-3 APC. For integration of the infantry mortar in the middle of the vehicle was done an extension of the hull, and the hatch in the roof. Fire from a mortar can be started without special operating. If necessary, the vehicle can be relocated as soon as possible in order to protect itself from return fire.
As the mortar and ammunition is located in the troop compartment of the armored personnel carrier, its crew is reduced in comparison with the standard vehicle. At the same time, keep the amphibious.