This rule proposes to amend ATF regulations to clarify that certain training rounds do not meet the definition of ammunition as defined by the Gun Control Act and are not regulated by the Arms Export Control Act. More specifically, it would amend the definition of "ammunition" to clarify that the term would not include any fully assembled training round that is not designed for offensive or defensive combat (i.e., anti-personnel) and is not for use in a weapon that expels a projectile by the action of an explosive. Consequently, importers would not need to complete an ATF Form 6 under 27 CFR part 478 to bring training rounds into the United States. Less-than-lethal ammunition, which is distinct from training rounds, will still generally be considered ammunition.