I admit I don’t follow this stuff very closely, but a number of years ago, this seemed like a hot topic — 3D printers were getting better, people were managing to make some (primitive) guns, and it seemed like gun laws were going to be superseded by the ability to “print” a gun whenever and wherever you wanted.
Then I stopped hearing about this topic. Maybe I just stopped paying attention. But it seems odd.
“Then I stopped hearing about this topic.”
The powers that be, made the people who reported on this an offer they couldn’t refuse. IMO, THAT’s why it “went away”! ;)