Comparing: SU-122-44 vs. Krupp-Steyr Waffenträger

Development was started in June 1944 by the Uralmash Design Bureau. The vehicle was based on the T-44 chassis and had a conventional configuration, with the front placement of the fighting compartment. In October, People's Commissariat of the Tank Industry considered the SU-122-44 project. In December the design project was ready. However, the SU-100M-2 with the rear placement of the fighting compartment was preferred.

A vehicle project by Steyr as a special artillery transporter that would be able not only to transport the gun but also to fire it from the chassis. To keep costs down and reduce complexity, the design used many components of the Raupenschlepper Ost, a tracked artillery mover. The turret and gun were supplied by Krupp. One wooden model and one prototype were manufactured by September 2, 1944.