“Firearm”, a stun gun, pistol, revolver, rifle, shotgun, sawed-off shotgun, large capacity firearm, assault-style firearm and machine gun, loaded or unloaded, which is designed to or may readily be converted to expel a shot or bullet; the frame or receiver of any such firearm or the unfinished frame or receiver of any such firearm; provided, however, that “firearm” shall not include any antique firearm or permanently inoperable firearm.
“Unfinished frame or receiver”, a forging, casting, printing, extrusion, machined body or similar item that: (i) has reached a stage in manufacture when it may readily be completed or assembled to function as a frame or receiver; or (ii) is marketed or sold to the public to become or be used as the frame or receiver of a functional firearm once completed or assembled; provided, however, that “unfinished frame or receiver” shall not include a component designed and intended for use in an antique firearm.