This is a Minecraft BT7 tank with a working dispenser cannon. The BT 7 was a Soviet light cavalry tank and the last of the BT series. It was produced between 1935 and 1940 and its primary weapon was a 45 mm cannon. The BT 7 was the main soviet tank at the outset of the German invasion of the Soviet Union and although it was outclassed by the German tanks they were still used until the end of the war.