North Carolina General Statutes Chapter 14. Criminal Law § 14-409.11. “Antique firearm” defined

(1) Any firearm (including any firearm with a matchlock, flintlock, percussion cap, or similar type of ignition system) manufactured on or before 1898.

(2) Any replica of any firearm described in subdivision (1) of this subsection if the replica is not designed or redesigned for using rimfire or conventional centerfire fixed ammunition.

(3) Any muzzle loading rifle, muzzle loading shotgun, or muzzle loading pistol, which is designed to use black powder substitute, and which cannot use fixed ammunition.

(1) Incorporates a firearm frame or receiver.

(2) Is converted into a muzzle loading weapon.

(3) Is a muzzle loading weapon that can be readily converted to fire fixed ammunition by replacing the barrel, bolt, breechblock, or any combination thereof.