I’m sure it would be alot cheaper to just buy a welder and make your own from a little bit of sheet metal and a spring. There’s nothing sensational about a 3D printed magazine. I’d be more impressed when they can start layering metal with extreme precision and can make small metal parts. That’ll be much more useful.
“Law enforcement officials should have the power to stop high-capacity magazines from proliferating with a Google search.”
Guess what? It doesn’t matter what you think they should have the power to do. The technology is here and you can’t stop it. Neener neener neener!