What documentation does an alien need to show U.S. Customs and Border Protection (CBP) when entering the United States with a firearm?

When entering the United States, an alien must show CBP both the approved Form 6 NIA (5330.3D) permit, and if admitted to the United States under a nonimmigrant visa, appropriate documentation demonstrating you fall within an exception to the nonimmigrant alien prohibition.

[27 CFR 478.120]

Last Reviewed September 23, 2016