Federal law, found in both the National Firearms Act and the Code of Federal Regulations (CFR Part 479) outline these items. Some examples include:
- Machine guns;
- The frames or receivers of machine guns;
- Any combination of parts designed and intended for use in converting weapons into machine guns;
- Any part designed and intended solely and exclusively for converting a weapon into a machine gun;
- Any combination of parts from which a machine gun can be assembled if the parts are in the possession or under the control of a person;
- Suppressors, and any part designed and intended for fabricating a supressor;
- Short-barreled rifles;
- Short-barreled shotguns;
- Destructive devices; and,
- “Any other weapon.”
- Molotov cocktails;
- Anti-tank guns (over caliber .50);
- Bazookas; and,
- Mortars
- H&R Handyguns;
- Ithaca Auto-Burglar guns;
- Cane guns; and,
- Gadget-type firearms and “pen” guns which fire a projectile by the action of an explosive. So, essentially anything from a James Bond movie should be a tip-off.
Note also that certain parts which convert a firearm into an NFA firearms are also subject to registration, such as:
- An M-2 conversion kit
- Any part designed and intended solely and exclusively to convert a weapon into a machine gun
