A Non Resident.....
Generally, a firearm may not lawfully be sold by a licensee to a non-licensee who resides in a State other than the State in which the seller’s licensed premises is located. However, the sale may be made if the firearm is shipped to a licensee whose business is in the purchaser’s State of residence and the purchaser takes delivery of the firearm from the licensee in his or her State of residence. In addition, a licensee may sell a rifle or shotgun to a person who is not a resident of the State where the licensee’s business premises is located in an over–the–counter transaction, provided the transaction complies with State law in the State where the licensee is located and in the State where the purchaser resides.
[18 U.S.C. 922(b)(3); 27 CFR 478.99(a)]
In theory the purchase of an assault rifle (regular rifles and shotguns) (MN definition) from FFL Holder in say WI as long it follows the WI and MN laws (PTP or PTC). And the dealer wishes to do it.
In the old days, it was you could only buy long guns from a Contiguous State....for MN that would be ND, SD, IA, and WI