An experimental tank destroyer that was intended to replace the SU-100. In April–May 1945, two prototypes were built and passed trials. Decent technical characteristics did not help the project succeed, and, after the end of the war, it was discontinued due to the impracticality of launching production of a new vehicle based on the war vehicles.
The technical characteristics shown are for the Siege mode
Characteristics are specified for a vehicle with crew members trained to 100%.