Largest Caliber Guns Ever Made admin - 0 The German “Gustav Gun” was the largest caliber rifled weapon ever used in combat. True False None The U.S. Navy’s Iowa-class battleships were equipped with 20-inch guns. True False None The Tsar Cannon in Russia is the largest caliber howitzer ever built, but it has never been fired. True False None The Paris Gun, used in World War I, could fire shells into outer space. True False None The U.S. once tested a nuclear artillery shell called the "Atomic Annie." True False None Time's up
