Machine guns and cannon.
A bullet fired from a gun
Anti-Aircraft gun
A round is loaded into a gun. The gun is then cocked and then fired.
This gun is a Rifle
A gun recoils when fired due to the need to eject the casing and to recycle the pent up gas
A machine gun uses energy from the fired cartridge to operate the mechanism to unload the fired catridge, and to load a fresh cartridge- which is fired, and repeats the cycle.
It doesn't.
When a gun is fired a bullet (or cartridge) with a small mass but a very high velocity is ejected. The recoil of the gun is a reaction to this force and is sufficient to push back the person who fired the weapon.
Yes, but only if the gun is not fired. If the gun you see on the big screen is fired, then it isn't an airsoft gun, it is a prop gun, or a cap firing gun.
The aircraft mounted machine gun was at first simply a ground machine mounted for a gunner to fire. All sides in WW1 used it. The first successful machine gun fired by a pilot was the Lewis machine gun on a special mounting attached to the top wing, allowing the gun to fire over the propellor.
Bob Ewell fired a gun in "To Kill a Mockingbird" during the final confrontation with Atticus Finch and his children.
Yes a gun can be fired under water. You can look it up on youtube the're plenty of videos showing it.