A few states have the same laws regarding suppressors and machine guns. Especially under the 2nd, 9th, and 10th amendments, it's entirely reasonable. But government enforcers are anything but reasonable.
A 3D-printed AR-type receiver is quite viable, provided there is some reinforcement at the buffer tube region. I'd also suggest a unitized trigger drop-in kit instead of the usual pinned separate components.
Yeah, the attempt to negate the entire act by doing an end run around the interstate commerce clause had me amused. I find it curious how federal enforcers largely give up if they don't have the cooperation of the state enforcers.
I've always stayed away from ARs just because I dislike the 5.56 round. May have to reconsider that, one running 6.5 creedmoor would be right nice. Hmm....
.300 Blackout is ideal if you want a suppressed SBR.
That would be fun. Don't know how much of a need I have for one though, feel like I'd get more/better use out of something with a little more zip and range.
I knew a guy who used .300 Whisper (the wildcat round later commercialized as .300 Blackout IIRC) as his whitetail round in the woods here in the Pacific Northwest. He had bursitis or something in his shoulder. It was a balance of power and recoil he could manage.
As for the other point, isn't it odd how a clause written to prevent states from taxing or otherwise obstructing interstate commerce has become a means for the federal government to control interstate commerce?