The ATF told me receivers with buttstocks are not long guns, must be over 21.

[freakshow10mm]

Legal? Yes.

Possibly seen as circumventing the law in order to manufacture firearms and evade ITAR registration and all applicable FET? Depends.

[TripleT]

Legal? Yes.

Possibly seen as circumventing the law in order to manufacture firearms and evade ITAR registration and all applicable FET? Depends.

These are the kind of questions that seem to be open to interpretation. Problem is I don't want to be the guy footing the bill to have some court figure it out while my FFL has been suspended.