Assault Rifle

By U.S. Army definition, a selective-fire rifle chambered for a cartridge of intermediate power.

Assault Weapon

Any weapon used in an assault. Usually refers to selective-fire firearms that are capable of fully automatic, semiautomatic, or burst fire.

Automatic

A firearm designed to feed cartridges, fire them, eject their empty cases and repeat this cycle as long as the trigger is depressed and cartridges remain in the feed system. Examples: machine guns, sub-machine guns, selective-fire rifles, including true assault rifles.

Background Check

An investigation of a gun purchaser's background through the state police or the FBI to determine if the purchaser is prohibited from buying a gun.

Ballistic Fingerprint

The unique marking a gun leaves on a bullet after a bullet has been fired from the gun.

Firearm

A rifle, shotgun or handgun using gunpowder as a propellant.

Graffiti

Signs, symbols, writings, defining a gang's neighborhood, turf, or territory.

Handgun

Synonym for pistol.

Pistol

Synonymous with "handgun." A gun that is generally held in one hand. It may be of the single-shot, multi-barrel, repeating or semi-automatic variety and includes revolvers.

Rifle

A shoulder gun with rifled bore.

Semi-Automatic

A firearm designed to fire a single cartridge, eject the empty case and reload the chamber each time the trigger is pulled.

Set

Neighborhood gangs; term used for a gang by members of street gangs. Many sets are loyal to the Bloods, Crips, or People or Folks Nations.

Sub-machine Gun

An automatic firearm commonly firing pistol ammunition intended for close-range combat.

Zip Gun

Home made pistol

Source:
Airboat Association of Florida [1]