From the FL statutes
(6) “Firearm” means any weapon (including a starter gun) which will, is designed to, or may readily be converted to expel a projectile by the action of an explosive; the frame or receiver of any such weapon; any firearm muffler or firearm silencer; any destructive device; or any machine gun. The term “firearm” does not include an antique firearm unless the antique firearm is used in the commission of a crime.
(1) “Antique firearm” means any firearm manufactured in or before 1918 (including any matchlock, flintlock, percussion cap, or similar early type of ignition system) or replica thereof, whether actually manufactured before or after the year 1918, and also any firearm using fixed ammunition manufactured in or before 1918, for which ammunition is no longer manufactured in the United States and is not readily available in the ordinary channels of commercial trade.
(2) “Concealed firearm” means any firearm, as defined in subsection (6), which is carried on or about a person in such a manner as to conceal the firearm from the ordinary sight of another person.
(3)(a) “Concealed weapon” means any dirk, metallic knuckles, slungshot, billie, tear gas gun, chemical weapon or device, or other deadly weapon carried on or about a person in such a manner as to conceal the weapon from the ordinary sight of another person.
(b) “Tear gas gun” or “chemical weapon or device” means any weapon of such nature, except a device known as a “self-defense chemical spray.” “Self-defense chemical spray” means a device carried solely for purposes of lawful self-defense that is compact in size, designed to be carried on or about the person, and contains not more than two ounces of chemical.