- designer was Wassili Gawrilowitsch Grabin
- designed: 1941
- manufacturers: Gorky plant no. 92
- ≈ 100 were built
general
- mass was 4 tonnes (4.4 short tons; 3.9 long tons)
- length was 3.45 m (excluding gun)
- width was 1.86 m
- uses a crew of 4 - 5
armour, armament and mobility
- armour
→ at the hull 10 / 7 / 7 mm (front / side / back)
→ at the turret 5 / 0 / 0 mm (front / side / back) - uses as main armament the “57 mm ZiS-2” tank gun with 20 rounds (APHEBC, HE, APHE)
- secondary armament = 1 x 7.62mm DT machine gun with 756 rounds
- uses a GAZ-M, 4-cylinder gasoline engine with 50 hp (37 kW)
- was capable of reaching a maximum speed of 40 km/h
