Just skimmed the opinion in US vs. Stewart. The court at one point refers to "legal parts", when referring to some of the component parts. That would seem to imply that there could also be such things as "illegal parts". It is always the person who is "arrested" (FN FAL: The weapon is not arrested; the person is arrested.) Does that make the person illegal? What does "illegal alien" mean and is that term used in any court opinions? (Yes, it is.) And what does FN FAL mean when he states that the 9th Circuit "overturned" Setwart's conviction, but the lower court then "appealed it"? Procedurally, what does he mean? The "lower court" was not a party to the 9th Circuit proceedings as I read that court's opinion, and the procedure for the losing party at the Circuit Court level seeking further review is almost always to fie a petition for writ of certiorari with the U.S. Supreme Court--not an appeal--and it is a discretionary review which is rarely granted. The lower court would have no standing to seek certiorari review of the 9th Circuit decision. (Incidentally, the 9th Circuit reversed in part and affirmed in part.)