27 C.F.R. § 53.1
The regulations in this part (part 53, subchapter C, chapter I, title 27, Code of Federal Regulations) are designated "Manufacturers Excise Taxes-Firearms and Ammunition." The regulations relate to the tax on the sale of firearms and ammunition imposed by section 4181 of the Internal Revenue Code of 1986, and to certain related administrative provisions of chapter 32, subchapter F, of the Code. Chapter 32, subchapter D of the Code imposes taxes on the sale or use by the manufacturer, producer, or importer of certain recreational equipment specified in that chapter. References in the regulations in this part to the "Internal Revenue Code" or the "Code" are references to the Internal Revenue Code of 1986 (United States Code of 1986), as amended, unless otherwise indicated. References to a section or other provision of law are references to a section or other provision of the Internal Revenue Code of 1986, as amended, unless otherwise indicated.
27 C.F.R. § 53.1