Customs form 4457 can be used to show that a firearm being taken back into the US was previously owned in the US and not purchased abroad. It is the same form similarly used for expensive watches, cameras, etc. Once obtained, a form can be used for as many trips as you like. It can also be obtained before travel by visiting a Customs office with the item or items to be listed. I think that the items may have to have a serial number so that they can be easily identified upon reentry to the US.
Google Customs Form 4457 for more information.
Last edited by vangulil; 02/18/12 12:08 AM.
