Heavy self-propelled artillery gun KV-7 was based on serial
heavy tank KV-1. It was issued in April 1942 and was a 2-barrel version of
KV-6 SPG. The main armament consisted of two 76-mm guns ZIS-5. Additional
weapons were the two DT machine guns. Because the caliber of guns in the 76 mm was
not enough to combat the new German heavy tanks, KV-7 SPG did not have mass production.