Firearm means any device designed, made, or adapted to expel a projectile by the action of an explosive or any device readily convertible to that use.
Antique firearm means a firearm or replica of a firearm not designed or redesigned for using rim fire or conventional center fire ignition with fixed ammunition and manufactured in or before 1898, including any matchlock, flintlock, percussion cap, or similar type of ignition system and also any firearm using fixed ammunition manufactured in or before 1898, for which ammunition is no longer manufactured in the United States and is not readily available in the ordinary channels of commercial trade.
Firearms means (1) any weapon (including a starter gun) which will or is designed to or may readily be converted to expel a projectile by the action of an explosive; (2) the frame or receiver of any such weapon; (3) any firearm muffler or firearm silencer; or (4) any destructive device. Such term does not include an antique firearm.
imitation firearm means an article, not being a firearm, which has the appearance of being a firearm, or which may reasonably be taken to be a firearm;
explosive actuated fastening device means a tool that is activated by an explosive charge and that is used for driving bolts, nails and similar objects for the purpose of providing fixing;