The largest gun was the 18 inch guns on the Japanese battleship[p yamato.
The largest water gun fight was recorded in Bangkok, Thailand. Almost 3471 people spraying each other for 10 minutes set a new world record for the largest water gun fight.
At largest, about a foot.
the larger hundgun is the 44mag
smith and weston
Prehaps 30mm GAU-8
A belt fed machine gun- no limit. The American 180 was a .22 LR machine gun with a 177 round magazine.
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.
Sons of Guns - 2011 World's Largest Machine Gun 3-6 was released on:USA: 4 April 2012Sons of Guns - 2011 World's Largest Machine Gun - 3.6 was released on:USA: 4 April 2012
Assuming that you mean small arms it is the 30 cal Gatling gun
Remington is a likely candidate. They are also the oldest US gun maker still in business.
the guy in Sweden...or was it Denmark
USA ,followed by Russia.If it is toy gun it is China.