Hunt, sport, defense, collecting.
That is where the bullet comes out of the gun.
That will vary with the purpose for which you have the gun.
The purpose of a paintball gun is to fire paintball pellets, to mark opponents in the game of paintball.
It depends on what you mean. Gun safety class for what purpose? Illinois does not issue a gun carry permit so there is no safety class for that. If you mean for a different purpose, it depends on what the purpose it.
Weapon.
shoot people.
The main purpose of gun oil is to lubricate the moving parts of the gun in order to reduce heat buildup. Gun oil is used to prevent cracking of the metal as well a wear and tear upon firing a rifle.
The purpose of inventing the machine gun was to have better fire power during the wars to defends places and win positions and the war.
They were made either to do battle or to hunt
its gun
The stated purpose is to "keep guns out of the wrong hands". It rarely works.
Grooves cut into the inside of a gun barrel for the purpose of spinning the bullet when fired.