Let's say I'm selling a factory AR-15 on Armslist. 14.7" pinned barrel so it is factory rifle length if that makes a difference. Not a 'pistol', and it is a normal factory assembled matching receiver set, so nothing weird going on to make it unique or special. An otherwise legit buyer wants it, but requests that I send just the lower to his FFL, and then send the upper directly to him. My first instinct at the request is 'scam alert', but I get to thinking about it and I cannot put my finger on what the endgame would be. The shipping cost would still be the same (if not more), because now I have to ship two packages instead of one. He still has to go through his FFL to get the lower receiver, so its not like he's somehow avoiding a background. I'm racking my brain trying to figure out what the scam is, and I'm coming up with nothing, and if it's not a scam I can't figure out the logic for the request in the first place.
Can someone tell me what I'm missing? I'm not worried about getting scammed out of money, that's not going to happen and I would have secure funds in hand before I ever ship anything. I'm more worried that I'm missing some obscure legality here and it's some elaborate sting and I don't want the feds to shoot my poor dog on their way through the door.
Surely the COAR brain trust can deliver on this one. Thanks.

