Firearms automatically attain C&R status when they are 50 years old. Any firearm that is at least 50 years old, and in its original configuration, would qualify as a C&R firearm. It is not necessary for such firearms to be listed in ATF's C&R list. Therefore, ATF does not generally list firearms in the C&R publication by virtue of their age. However, if you wish for a classification of your particular firearm under categories (b) or (c) above and wish your item to be listed, you may submit the weapon to the Firearms Technology Branch (FTB) for a formal classification.

This guide lists curios or relics firearms for gun collectors. As set out in the regulations (27 CFR 478.11), curios or relics include firearms which are of special interest to collectors by reason of some quality other than is associated with firearms intended for sporting use or as offensive or defensive weapons. This publication is a cumulative digest of determinations made by the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) and is not inclusive of all weapons meeting curio or relic classification (i.e., firearms manufactured at least 50 years prior to the current date).