[Sandy]

922(o) "does not apply with respect to...a transfer to or by, or possession by or under the authority of, the United States or any department or agency thereof or a State, or a department, agency, or political subdivision thereof."

The phrase in bold is the loophole, I guess. Whoever jumps through the right hoops is exempt, apparently.
Here's the regulations (see section 179.105).

[Triple]

Hmmm...

Under the authority of the United States...

Don't citizens have the right to bear arms under the authority of United States as this right is explicitly recognized in the amendments to the US Constitution?
.<./Rhetoric.>.

Thank you for your response.

Regards,