What happened to me yesterday did not sit well and I am curious? Why would he take the responsibility and liability of opening the gun prior to my arrival or outside my presence? How do I verify the gun he gave me is actually mine if I don't see the mailing label on the packaging?
the easiest thing to do would be to get the serial# from the seller of the gun prior to him shipping it to you. that's what I did and when my rifle arrived I matched up the serial# to the gun and everything was fine.
I personally have no problem with an FFL opening my package and inspecting the gun. It is arriving at his store and he has to verify that everything in the box is legal.