Alito didn’t stop there, however, and also questioned whether assembly time matters in determining regulation standards.
“Some of us who are not — who don’t have a lot of mechanical ability have spent hours and hours and hours trying to assemble things that we’ve purchased,” Alito said.
Took me less than hour, and I wasn't even trying to go fast. It's barely harder than a Lego set. There's a few pieces of plastic you need to file down, and that plastic is intentionally printed "weak" so it comes right off.
After that it's the exact same as taking a Glock apart and putting it back together again.
Even if you have zero experience, all the manufacturers have YouTube videos that walk you thru it. Not gonna bother searching, but I'd be shocked if any of those videos are longer than half an hour.
Edit:
And when you hear about "switches" that turn a normal handgun automatic, those are almost always talking about the same type of pistol you make on these kits. So people being able to easily make one of these a much bigger problem.
We've needed to move away from the frame being the serialized part for a long time now to avoid this shit.
Sig and even Keltec and some others are serializing the FCU (fire control unit, which is trigger and some other stuff) instead, and that just makes so much more sense than the frame.