Disclaimer: SKS-files.com is not composed of legal experts, we do our absolute best to make sure that what we post here is accurate, thorough, and factually based. Still, it is the epitome of foolishness to listen to “a guy on the internet” as your sole basis for legal advice. If you have specific questions about this subject, you should consult appropriate legal council who specialize in firearms law or contact the ATF directly to obtain a formal determination about your particular firearm or issue.27 CFR Section 478.11
defines "curios or relics" as:
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. To be recognized as curios or relics, firearms must fall within one of the following categories:
(a) Firearms which were manufactured at least 50 years prior to the current date, but not including replicas thereof;
(b) Firearms which are certified by the curator of a municipal, State, or Federal museum which exhibits firearms to be curios or relics of museum interest; and
(c) Any other firearms which derive a substantial part of their monetary value from the fact that they are novel, rare, bizarre, or because of their association with some historical figure, period, or event. Proof of qualification of a particular firearm under this category may be established by evidence of present value and evidence that like firearms are not available except as collector's items, or that the value of like firearms available in ordinary commercial channels is substantially less.
A Curio and Relics (C&R) federal firearms license (FFL) is a special type of FFL, designated a type 03 FFL (FFL03) that allows collectors to acquire and dispose of C&R firearms in interstate commerce for the purpose of building and maintaining a personal collection. The license allows collectors to receive C&R firearms sent directly to their address of record as long as the collector follows the state laws where they reside.