a Tommy gun
In a Gun Shop
1) Primary gun 2) Flood gun
the gatling gun was used for taking out large troups of enemies
A Lewis gun was an early type of machine gun used in WW1.
The British used the Vickers machine gun
A rivet gun is used to punch steel bolts into steel beams.
What do you mean 500 feet used in gun safety?
It is a gateway gun
Impossible to answer without knowing the type of gun.
The gun used in running races is called a starter's pistol.
Some are used to learn the basics of gun handling. Some are used for target practice and rodent control.