Below is a cut/paste from the ATF brochure on C and R requirements: What is a firearm curio or relic? Firearm curios or relics include firearms which have special value to collectors because they possess some qualities not ordinarily associated with firearms intended for sporting use or as offensive or defensive weapons. To be recognized as curios or relics, firearms must fall within one of the following categories: 1) Have been manufactured at least 50 years prior to the current date, but not including replicas thereof; or 2) Be certified by the curator of a municipal, State, or Federal museum which exhibits firearms to be curios or relics of museum interest; or 3) Derive a substantial part of their monetary value from the fact that they are novel, rare, bizarre, or from the fact of their association with some historical figure, period, or event. [27 CFR 478.11] Does this mean that ANY firearm over 50 years old automatically gets C and R status on that account alone? Or does it mean that any firearm over 50 years old is subject to being designated by the ATF as a C and R? In other words, do I need to see a specific ATF listing for any specific firearm (by model number) to know that it indeed is a C and R firearm?