ORIGINAL: Bandhunter
It is not that difficult. Once you receive payment and a copy the of the buyer's FFL, just box it up, address the label to the FFL address and take to the PO or a UPS outlet and pay them to ship it. You don't have to use a FFL to ship or contact the FFL who will be recieving the gun. They will complete the background check on the buyer and its done.
Bandhunter is 100% correct in what he states.