27 CFR 478.111 - General.
(a) Section 922(a)(3) of the Act makes it unlawful, with certain exceptions not pertinent here, for any person other than a licensee to transport into or receive in the State where the person resides any firearm purchased or otherwise obtained by the person outside of that State. However, section 925(a)(4) provides a limited exception for the transportation, shipment, receipt or importation of certain firearms and ammunition by certain members of the United States Armed Forces. Section 922(1) of the Act makes it unlawful for any person knowingly to import or bring into the United States or any possession thereof any firearm or ammunition except as provided by section 925(d) of the Act, which section provides standards for importing or bringing firearms or ammunition into the United States. Section 925(d) also provides standards for importing or bringing firearm barrels into the United States. Accordingly, no firearm, firearm barrel, or ammunition may be imported or brought into the United States except as provided by this part.
(1) Store, at the person's expense, such firearm, firearm barrel, or ammunition at a facility designated by U.S Customs or the Director of Industry Operations to await the issuance of the required authorization or other disposition; or
(c) Any inquiry relative to the provisions or procedures under this subpart, other than that pertaining to the payment of customs duties or the release from Customs custody of firearms, firearm barrels, or ammunition authorized by the Director to be imported, shall be directed to the Director of Industry Operations for reply.