Prototype of the KV-122 was created in the spring of 1944 by the Construction Bureau of the Chelyabinsk Kirov Plant on the basis of the KV-85 and differed from the latter in a turret with a 122-mm gun. The turret was copied from the IS-2 designed in 1944. After the production of the IS heavy tanks started, all work on the project was discontinued.
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The technical characteristics shown are for the Siege mode
Characteristics are specified for a vehicle with crew members trained to 100%.