The largest gun ever built was the "Gustav Gun" built in Essen, Germany in 1941 by the firm of Friedrich Krupp A.G. Upholding a tradition of naming heavy cannon after family members, the Gustav Gun was named after the invalid head of the Krupp family - Gustav Krupp von Bohlen und Halbach. The strategic weapon of its day, the Gustav Gun was built at the direct order of Adolf Hitler for the express purpose of crushing Maginot Line forts protecting the French frontier. To accomplish this, Krupp designed a giant railway gun weighing 1344 tons with a bore diameter of 800 mm (31.5") and served by a 500 man crew commanded by a major-general.






The world's largest shotgun aka Punt Gun measures 10-feet long and has a 2-inch barrel. Due to its size and recoil, this gun has to be mounted directly on the punts. Just a single blast could wipe out 50-100 ducks resting on the water's surface