The gun was installed in a quiet bulky turret, the height of the model increased up to 3.25m. They could shoot while not moving only. Their weight was 52 ton, crew consisted of 6 men and its speed was lesser than of KV-1. The last mass modification of KV tank was the KV-85 model, produced during the autumn of 1943. Weight was increased up to 46 ton, crew decreased to 4 members and machineguns to 2.
Speed remains as it was.
At the end of 1943 tank KV was replaced by the new heavy tank IS-1. KV was the good construction of a heavy tank. Thanks to its superiority KV were seeking the encounters with the enemy tanks, while the German vehicles tried to avoid them. Soviet authors say that it always had the iniciative during the tank battles and that it was the mightiest tank of the world up to the end of 1942.