Though called a heavy tank, the KV-2 is really a self-propelled howitzer. Plagued with transmission failures from a combination of the unreliable KV-1 chassis and the added weight of the slab-sided turret, the KV-2 did not see much action and was quickly replaced by the SU-152, which was essentially the same vehicle but with a fixed gun. The KV-2 would be nothing more than a clumsy-looking failed experiment were it not for its great fame in World of Tanks, in which it is known, among other things, as "the derpinator."
This is a simplified model. I have a more detailed model in 1/100 scale, but the chassis and turret are separate.