https://www.atf.gov/firearms/curios-relics ATF list https://www.atf.gov/firearms/curios-relics Apply for your Federal Curios and Relics Permit licensed Curio & Relic (C&R) collectors Curio Relic curios and relics license https://www.atf.gov/firearms/curios-r... Curio or Relic https://www.atf.gov/firearms/curios-relics Curio Relic https://www.atf.gov/firearms/curios-relics https://www.atf.gov/firearms/curios-relics Curios & Relics classifies a firearm a curio or relic