Handguns and antique firearms with a frame, barrel, cylinder, slide, or breech-lock is composed of any material that has a melting point below 1,000 degrees F or has a an ultimate tensile strength of less than 55,000 psi or is comprised of any powdered metal that has a density of less than 7.5 grams/cubic cm
Walther rimfire pistols, Cobra, Phoenix Arms, Heritage Arms, Hi-Point, and GSG rimfire pistols

Updated 12 June 2019