ADDED: per the NRA's page on California gun laws, in theory its even legal to have and transport one, although evidently the permits to do so are never granted (well, I assume except for Hollywood...).
2 known illegal uses of legal machine guns in private hands in the US ... one by a cop....
http://stevespages.com/pdf/sten_mk2_complete_machine_instruc...
Really don't need much of a machine shop to knock one of them out.
It's true this device alone doesn't make an automatic weapon, but it certainly catalyzes the process of making an untraceable automatic weapon.
Once you have made an untraceable semi-auto AR-15 with this device, you can then make it untraceable auto with numerous ways.
And, no, it doesn't catalyze this, or at least no more than allowing the sale of millions of finished AR-15s. Those are a lot closer than a 80% receiver and a pile of parts, "Some assembly required".
The metric is absurd. As one gunsmith noted, he could turn a VW Bug (car) into a machine-gun well within the BATF metric.
ITYM millions of traceable AR-15s.
If someone wants an untraceable machine gun, they can buy this device and perform mods.
∴ This device catalyzes making untraceable machine guns.
If you really want this you have probably either watched too much TV or want to score political points and harass gun stores, distributors and/or manufacturers. See Fast and Furious for the most notorious example of this.
Because you and others have been hostile toward me, claiming this device doesn't catalyze untraceable weapons.
Now you're moving the goalposts, claiming tracing doesn't actually matter.
You might interpret your own hostility as an attempt to extort confirmation in the face of invalidating evidence. You will feel much better when you admit you were wrong and go back and undo your down votes.
> It very seldom solves crimes
1. So, by your own admission, it does solve crimes, at least sometimes. So that's one reason to give a damn about the production of untraceable machine guns there. Mind you, I'm using your own words to prove my point.
2. It prevents crimes from happening. That's a second reason to give a damn about the production of untraceable machine guns.
So, where do you feel like moving the goalposts to next? Or do you want to just concede you acted to rashly and misspoke? It's a small point really and you'll feel much better if you just admit what your own words have demonstrated - this machine catalyzes the production of untraceable machine guns.
But if you want to be concerned, look at how utterly simple a full auto (simpler that way, e.g. firing pin is a bump in the bolt face) 9mm Sten gun is: https://en.wikipedia.org/wiki/Sten
(A semi-auto AR15 is a much more capable weapon, BTW.)