Re: Cute, but not for long
The point about barrel stress is a good one, but unfortunately is slightly besides the point. Many gun components can be bought and sold in the USA without any restrictions whatsoever. IIRC, the sticking point for building your own AR-15 out of spare parts is obtaining a lower receiver, which is strictly controlled (it's the piece that carries the gun's serial number). This is the only piece you actually need to fabricate yourself in order to obtain your own unlicensed AR-15 with no documentation trail.
I'm no gun expert, but I have my suspicions that the receiver isn't subjected to the stresses that the gun barrel is subjected to during firing, and therefore a CNC-fabricated version may be good enough to last for a while - e.g. the duration of a mass shooting.
Biting the hand that feeds IT
