Rev. Rul. 54-606

Advice has been requested whether the possession of sufficient parts to assemble a firearm constitutes the possession of a firearm.

Where an individual, partnership, company, association, or corporation has possession or control of sufficient parts to assemble an operative firearm as defined in section 5848(1) of the Internal Revenue Code of 1954, the possession or control thereof constitutes the possession of a firearm. Further, the transfer, as defined in section 5848(10) of such Code, of sufficient parts to assemble an operative firearm is deemed to constitute the transfer of a firearm subject to the tax imposed under section 5811(a) of the Code.