The Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) regulates and restricts firearms and ammunition and approves all permanent import transactions involving weapons and ammunition. If you want to import weapons or ammunition, you must do so through a licensed importer, dealer or manufacturer. Also, if the National Firearms Act prohibits certain weapons, ammunition or similar devices from coming into the country, you will not be able to import them unless the ATF provides you with written authorization to do so. If the firearm is controlled as a U.S. Munitions List article and it is temporarily imported to the United States, or it is temporarily exported, it may also require a Department of State license or need to meet the conditions for a license exemption.
You do not need an ATF permit if you can demonstrate that you are returning with the same firearms or ammunition that you took out of the United States. To prevent problems when returning, you should register your firearms and related equipment by taking them to any CBP office before you leave the United States. The CBP officer will register them on the same CBP Form-4457 used to register cameras or computers. For more information, please refer to the Tip: Register Items Before You Leave The United States page.
For further information about importing weapons, contact the Bureau of Alcohol, Tobacco, Firearms and Explosives at:
Bureau of Alcohol, Tobacco, Firearms and Explosives
Office of Public and Governmental Affairs
99 New York Ave. NE
Mail Stop 5S144
Washington, DC 20226
The Department of State, Directorate of Defense Trade Controls (DDTC) regulates the permanent export, temporary import and temporary export of rifles and handguns, plus ammunition. If you want to temporarily import/export or permanently export rifles, handguns and ammunition, you must either obtain a license from DDTC or qualify for a license exemption under 22 CFR 123.17 or 123.18. The export of shotguns and buckshot is controlled under the Bureau of Industry and Security's Export Administration Regulations.
Many countries will not allow you to enter with a firearm even if you are only traveling through the country on the way to your final destination. If you plan to take your firearms or ammunition to another country, you should contact officials at that country's embassy to learn about its regulations.