The 80 cm K(E) Railroad Gun commonly called the "Dora" was called the "Gustav" by the Germans. It had a crew of 2,000, a General Officer in command and in the 13 day that it was operational, it only fired 48 rounds in combat. It remains the largest artillery piece ever built.
A big gun is a large artillery gun or one of the largest-calibre naval guns, or a person, group or thing which is powerful, influential, or effective.
The German 'Paris Gun' could fire approximately 75 miles.
The massive Schwerer Gustav gun (80 cm (31 in) was the largest artillery piece (Railway Gun) to be used in combat deployed by Germany .
The largest artillery piece currently employed by the U.S. Army is the 155mm Howitzer. Its shell diameter is 155mm and each shell weighs 43.5 kg, or about 95 lbs.
Artillery
The wheeled support of an artillery gun is called the carriage.
An Artillery piece (large cannon) or gun firing a large calibre shell. When the shell landed this would be an artillery explosion.
The largest airborne gun is carried by the AC-130 Hercules Spectre Gunship. It packs a 105mm M102 Howitzer. This is a field artillery cannon modified to fire from the aircraft in ground support roles.
The name of the German cannon that fired on Paris in World War 1 was the "Paris Gun" or "Kaiser Wilhelm Geschütz." It was a long-range artillery gun designed to shell targets from a distance of over 120 kilometers.
Anti-Aircraft gun
Several companies. The largest was not a company, but the state run munitions plant DWM.