The "starter"
The person is usually called "the starter."
A sub-machine gun fires pistol cartridges. A machine gun fires rifle rounds.
starter
BB gun. Fires a round BB.
A starter gun. Fires a blank type cartridge.
How do u call a person who practice track and field
The Railgun, it fires over double the speed of sound.
The starter solenoid is bad.
Artillery
No. They trap and slow the release of gasses after the gun fires.
The Dillon Aero M134 Gatling gun fires either 2000 or 4000 rounds per minute, it is selectable.