27 CFR 478.37 - Manufacture, importation and sale of armor piercing ammunition.
No person shall manufacture or import, and no manufacturer or importer shall sell or deliver, armor piercing ammunition, except:
(a) The manufacture or importation, or the sale or delivery by any manufacturer or importer, of armor piercing ammunition for the use of the United States or any department or agency thereof or any State or any department, agency or political subdivision thereof;
(b) The manufacture, or the sale or delivery by a manufacturer or importer, of armor piercing ammunition for the purpose of exportation; or
(c) The sale or delivery by a manufacturer or importer of armor piercing ammunition for the purposes of testing or experimentation as authorized by the Director under the provisions of § 478.149.