I am not a lawyer, however:
"18 U.S.C. § 922 : US Code - Section 922: Unlawful acts
(a) It shall be unlawful --
(2) for any importer, manufacturer, dealer, or collector licensed under the provisions of this chapter to ship or transport in interstate or foreign commerce any firearm to any person other than a licensed importer, licensed manufacturer, licensed dealer, or licensed collector, except that --
(A) this paragraph and subsection (b)(3) shall not be held to preclude a licensed importer, licensed manufacturer, licensed dealer, or licensed collector from returning a firearm or replacement firearm of the same kind and type to a person from whom it was received; and this paragraph shall not be held to preclude an individual from mailing a firearm owned in compliance with Federal, State, and local law to a licensed importer, licensed manufacturer, licensed dealer, or licensed collector;"
From my understanding, and personal experience, a manufacturer can legally ship a replacement firearm directly to the original owner.
And once again, I am not a lawyer; proceed at your own risk...
The lowest paid college major/degree in this country after graduation...
Now, go figure...