27 C.F.R. § 478.93
The license issued to a collector of curios or relics under the provisions of this part shall cover only transactions by the licensed collector in curios and relics. The collector's license is of no force or effect and a licensed collector is of the same status under the Act and this part as a nonlicensee with respect to (a) any acquisition or disposition of firearms other than curios or relics, or any transportation, shipment, or receipt of firearms other than curios or relics in interstate or foreign commerce, and (b) any transaction with a nonlicensee involving any firearm other than a curio or relic. (See also §478.50.) A collectors license is not necessary to receive or dispose of ammunition, and a licensed collector is not precluded by law from receiving or disposing of armor piercing ammunition. However, a licensed collector may not dispose of any ammunition to a person prohibited from receiving or possessing ammunition (see §478.99(c) ). Any licensed collector who disposes of armor piercing ammunition must record the disposition as required by §478.125(a) and (b).
27 C.F.R. §478.93