Then I missed the public discussion on why making it illegal to possess DIY guns is not enough. Did that actually get debated or just handwaved away? By the time I became aware of this whole technical blocking thing, that was the only proposal on the table.
> making it illegal to possess DIY guns is not enough.
This would be an unconstitutional law, per Bruen.
Ah, I think I know this one. It's because people who make their own guns are nerds. You know, like you or I, except in a different topic. I remember reading a couple of posts on R*dd*t where two folk were discussing fitting accessories to guns and one posted something like "No, you can fit that, all you do is mill a slot on top of the receiver and drill and tap a hole at the end and you can just about screw this thing in place" kind of thing.
I read the discussion and thought "yeah that's nerd talk, just not about analogue synthesizers, old Landrover gearboxes, or Pascal compilers".
I guess the reason for blocking 3D printers from making gun parts is because it's easier than doing it "by hand". All you really need to do is get a copy of the files from someone who has them, print it out in something suitable, and you have viable gun components with very little "real work" involved.
By contrast here in the UK, where it's quite surprising what you're allowed to own and operate if you comply with the laws (here you're allowed fully automatic weapons, if you keep them at a suitable shooting range and don't try to wander around town with them, and you're not oh maybe a convicted violent criminal for example) one of my late father's friends was a gunsmith. My dad was an excellent machinist, and so he made some components for his friend, and I remember standing in the machine shop where they worked while he turned a chamber for a gun his colleague was building in the lathe. "There you go," he said, taking it out of the chuck, "that's legal".
Then he took it over to the mill, and cut a couple of holes and slots that would allow it to actually function as a chamber, "And there - now it's *illegal*."
Then, as he handed it to his friend, who was licensed to have "home made" gun parts, to stamp his initials on, "And now it's legal again."
Of course since people aren't allowed to just walk around with handguns since the school shooting, it's all a little more difficult - but the police will tell you what you need to do to keep it legal.
It's still slightly easier to get a shotgun licence than a motorcycle licence here.