Yeah,
You're square with fed.gov if you "self ship" and no real transferrance is taking place. The other circumstance is inheritance of firearms, but you have to take posession in the originating state before you ship them to yourself. Breaking the guns into parts dosen't count though, as the frame or reciever, no matter how stripped of parts counts legally as "the firearm".
However UPS and FedEx will require an FFL at the destination in their own private rules. When I was shipping inherited firearms home, they required this, but I got them home anyway.
I even declared everything. When it didn't arrive, I thought they refused the next-day-air handgun shipment because I was not an 01 FFL, and was going to bluff my way through with my 03 C&R FFL, but after a several frustrating calls to the service center, it turned out the "license" I needed was for air transport of "hazmat".
Turns out the box I shipped the pistols in next-day-air was originally valve oil for air tools, and it was labled ORM-D. Magic markered it off, and resent it without trouble.
If you self-ship firearms interstate, but with no transferrance of ownership, you're only breaking UPS rules. The only thing is that I'd ship air to Alaska, as I can only assume that ground goes through Canada.