In the United States a Class 3 Federal Firearms License is a license for dealing in firearms and destructive devices regulated under the National Firearms Act of 1934.
NFA firearms include:
- Machine guns and certain machine gun parts
- Parts that can convert a regular gun into a machine gun
- Short barrel rifles (under 16 inches)
- Short barrel shotguns (under 18 inches)
- Silencers
- Gadget or disguised guns (pen guns, wallet guns, cane guns)
Destructive devices include:
- Hand grenades
- Bazookas
- Mortars
- Anti-tank guns (over .50 caliber)
- Artillery rounds