February 25, 1919
- Section 4181 of the Internal Revenue Code
- imposes an excise tax on imported firearms and ammunition
- since January 2003 – administered by the Alcohol and Tobacco Trade Bureau (TTB) within the U.S. Dept. of Treasury
- 10% tax of the sales price is imposed on pistols and revolvers
- 11% tax of the sales price is imposed on other portable weapons (rifles & shotguns) and ammunition