Citation(s) from the GunPolicy.org literature library
USA. 1968 ‘Unlawful Acts.’ Gun Control Act of 1968, Public Law 90-618, Title 18, United States Code - Firearms; Chapter 44 (Section 922). Washington, DC: Congress of the United States. 1 January
Relevant contents
Section 922. Unlawful Acts
(b) It shall be unlawful for any licensed importer, licensed manufacturer,licensed dealer, or licensed collector to sell or deliver -
(1) any firearm or ammunition to any individual who the licensee knows or has reasonable cause to believe is less than eighteen years of age, and, if the firearm, or ammunition is other than a shotgun or rifle, or ammunition for a shotgun or rifle, to any individual who the licensee knows or has reasonable cause to believe is less than twenty-one years of age;
Last accessed at:
http://www.gpo.gov/fdsys/pkg/USCODE-2011-title18/pdf/USCODE-2011-title18-partI-chap44.pdf