No, it is you who truly does not get it:
What about it?
Yes, you can manufacture federally regulated suppressors in some states without tax-stamp/etc. so long as the part is manufactured completely within the state (meaning,
no manufacturing materials move over state-lines) and remains in the state. The ATF has no realistic way to control auto-sears. As for HE devices, those exist but, realistically, the vast majority of the public is not equipped to own or use them so they are pretty niche thing.
In any case, as AF already explained to you, the "potentiality" of armed resistance has nothing to do with "F-15s and nukes", it has everything to do with the
political cost of a gun-grab. Every barking-mad policy proposal is potentially on the table... until the blood starts flowing in the streets. Waco forever altered the gun-grabbing equation, and not in favor of the gun-grabbers. That was just 6 dozen innocents. Imagine an entire southern small-town being bulldozed in the same way, at the cost of many deaths and casualties of Federal strorm-troopers.
What do you think will be the long-run political ramifications of that? Something like "a tank in every garage." Even the gun-grabbers are starting to realize the political costs of their folly although they always play stupid for the cameras. The fact that they keep fighting for gun-control -- no matter how clownish the measures involved -- only proves the point that
they know that popular gun-ownership is a fatal threat to their Agenda.
No permission required to purchase a 3D-printer. No permission required to purchase filament. No permission required to download models for any part you want to print, including fully-automatic weapons. The government has absolutely no way to track what you are printing on your 3D-printer.
If you live in a 10A state and the filament is sourced in-state, you can print anything you want and, if you are savvy, the Federal government will have a hard time doing anything to stop you, even if they do find out what you're doing. None of this is legal advice, and everyone should do their own research and make informed, responsible,
legal decisions. Nevertheless, you have a lot more power than you realize. You seem to be stuck in the 90's.
You mean, just like they restricted media piracy?
Oh, they're already trying. That's what all this Internet surveillance/censorship is about. They need to "see everything" so they can know who is downloading files for gun parts. And they want the power to block/censor everything for the same reason. But, as always, it's just clownish nonsense. Their capabilities do not and cannot match their ambitions.