The KV-1C started production in 1942. Full cast turret with armor up to 120 mm. Hull was up to 90 mm. A 600 hp engine was installed. 47 tons.
The 76.2 mm gun fired a 14.3 lb AP round at a muzzle velocity of 2,172'/sec.5
76.2 mm 1940 F-342
76.2 mm ZiS-5 L/413