The Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF) authorizes the importation of certain marking rounds (“training rounds”) because these training rounds do not meet the definition of “ammunition” as defined by the Gun Control Act of 1968 (GCA), 18 U.S.C. § 921(a)(17)(A). These items are not designed for offensive and defensive combat and are not “designed for use in any firearm.” Similarly, training rounds are not regulated by the Arms Export Control Act (AECA) because they are not designed for use in any “firearm” as defined in the permanent importation regulations implementing that statute.