World s BIGGEST, MOST POWERFUL GUN ever built ( Heavy Gustav Railway Gun. )

Worlds BIGGEST, MOST POWERFUL GUN ever built (Heavy Gustav Railway Gun. ) This is the Schwerer Gustav, or, in English, the Heavy or Great Gustav. And very, very heavy and great it was it weighed 1, 350 tonnes and could fire a 7 tonne shell to a range of 30 miles. Developed by Nazi Germany in the late 1930s, the Heavy Gustav 800 mm caliber monster canon was explicitly designed as a siege artillery weapon to penetrate and decimate the super thick reinforced concrete fortifications of the French defens