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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Time for the successive autoreloading of each shell into the magazine.
Characteristics are specified for Siege mode.
Characteristics are specified for Rapid mode.
Reload time of the first and second guns on double-barreled vehicles.
Characteristics are specified for vehicles with crews trained to 100%.