Weighing 53.1 tonnes and armed with 152 mm howitzer as it’s main gun, the Kliment Voroshilov 2, or KV-2 was a Soviet heavy tank from the second world war. In addition to it’s main gun, the KV-2 had 3 machine guns, and armour reaching 110 mm (4.3 in).
1. “Kliment Voroshilov tank.” Wikipedia: The Free Encyclopedia. Wikimedia Foundation, Inc., 5 Oct 2013. Web. 14 Oct 2013. <http://en.wikipedia.org/wiki/Kliment_Voroshilov_tank>.