(10) The term "manufacturer" means any person engaged in the business of manufacturing firearms or ammunition for purposes of sale or distribution; and the term "licensed manufacturer" means any such person licensed under the provisions of this chapter.
(21) The term "engaged in the business" means -
(A) as applied to a manufacturer of firearms, a person who devotes time,
attention, and labor to manufacturing firearms as a regular course of trade or business with the principal objective of livelihood and profit through the sale or distribution of the firearms manufactured;
§ 922. Unlawful acts
(a) It shall be unlawful -
(1) for any person -
(A) except a licensed importer, licensed manufacturer, or licensed dealer,
to engage in the business of importing, manufacturing, or dealing in firearms, or in the course of such business to ship, transport, or receive any firearm in interstate or foreign commerce; or
(A7) Does the GCA prohibit anyone from making a handgun, shotgun or rifle?
With certain exceptions a firearm may be made by a nonlicensee provided
it is not for sale and the maker is not prohibited from possessing firearms.
However, a person is prohibited from making a semiautomatic assault weapon or assembling a nonsporting semiautomatic rifle or nonsporting shotgun from imported parts. In addition, the making of an NFA firearm requires a tax payment and approval by ATF. An application to make a machinegun will not be approved unless documentation is submitted showing that the firearm is being made for a Federal or State agency.
[18 U.S.C. 922(o), (r), (v), and 923, 27 CFR 178.39, 178.40, 178.41 and
179.105]