|Engine Power (hp)||300|
|Speed Limit (km/h)||50|
|Standard Shell Penetration (mm)||73 - 99|
|Standard Shell Damage||135 - 225|
|Rate of Fire (rounds/min)||4.3|
Developed on the basis of captured German StuG III and Pz.Kpfw. III vehicles in 1943 at Sverdlovsk plant No. 37. A total of 200 vehicles were manufactured.