I've heard people call us trackies.
the "Starter"
A track athlete.
The people who fire the gun to start the race.
The starter is usually the person who shoot the gun or is the person recording time in Track and Field
gun (the starter's gun)
22 blank pistol
A starter gun. Fires a blank type cartridge.
A sub-machine gun fires pistol cartridges. A machine gun fires rifle rounds.
BB gun. Fires a round BB.
The Railgun, it fires over double the speed of sound.
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.
Simple answer, suppressive fires.