In this subtitle the following words have the meanings indicated. “Antique firearm” has the meaning stated in § 4–201 of the Criminal Law Article. “Federally licensed firearms dealer” means a person licensed by the federal Bureau of Alcohol, Tobacco, Firearms and Explosives to deal in firearms. “Federally licensed firearms importer” means a person licensed by the federal Bureau of Alcohol, Tobacco, Firearms and Explosives to import firearms. “Federally licensed firearms manufacturer” means a person licensed by the federal Bureau of Alcohol, Tobacco, Firearms and Explosives to manufacture firearms. “Firearm” has the meaning stated in § 5–101 of this title. “Secretary” means the Secretary of State Police or the Secretary’s designee. “Unfinished frame or receiver” means a forged, cast, printed, extruded, or machined body or similar article that has reached a stage in manufacture where it may readily be completed, assembled, or converted to be used as the frame or receiver of a functional firearm.