Another super-heavy tank design, KV-5 was developed since June 1941 and used experiences from KV-4's development. With unusual appearance, KV-5 was heavily armored and powerful, to be armed with same ZiS-6 gun of KV-4. By August 1941 the design was nearly complete, however the Siege of Leningrad halted, and eventually, canceled, the development of this tank.
KV-5 was heavily armored heavy tank and the largest Soviet tank ever developed. Using 107mm ZiS-6 cannon, KV-5 would have been able to fight on equal terms with most of German tanks in service at the time. There are two other turrets with machine guns for anti-infantry defense. However, because of its weight, bad transmission and power plant it was very slow, and with tis height it was easy target.
KV-5 was made long before, but I wanted to place it here along with KV-4, which was finished not an hour ago :)