If one insists on paperwork:
Transfers of long guns can be done at any FFL in the country that doesn't outlaw it by state laws. NV doesn't care, and neither does AZ.
Transfers of handguns must be completed at an FFL in the buyer's state.
Transfers of long guns can be done at any FFL in the country that doesn't outlaw it by state laws. NV doesn't care, and neither does AZ.
Transfers of handguns must be completed at an FFL in the buyer's state.