This site does a good job explaining it.As an unlicensed indvidule,in person you may purchase a long gun in any state (there are some restrictions when you reside in a sate like NJ for instance).You must of course fill out the 4473,and go through the NCIS check.
http://chris.cc/interstate.htm

Jent you can go to that state and meet him at a FFL and do the transfer there or you can have him ship the gun to a FFL near you and do the transfer in your state.he does not need a FFL to ship the gun to your FFL.

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