I don’t know how impactful those are, and I think a person with access to a decent metal shop could pose more danger.

What is it just the access that’s scary then? As a guy that doesn’t know guns, you often hear things like a potatoe or a water bottle can be made into a makeshift surpressor or turning a single fire into a sensative rapid fire trigger is trival. So I’m just not understanding why 3d printers are almost entirely linked to making guns in everyone’s minds. When I first got a elgoo that was the first thing people would jokingly ask if I was going to make one.

Like maybe I can understand the argument that access is so low anyone can do it, but even then you can’t just download a gun. The person who is doing this already bought gun parts and knows how to assemble them. This is not going to stop that kind of person from building a gun in any form. The gun is still the metal parts you buy online. A silencer, a trigger mod, whatever is useless until you handle ghost guns.