Isn't that what they mean when they say "caseless rounds"? That means there is no metal in the round at all. It's just brass and lead.
After all, to these putzs brass and lead aren't real metal, right?
Anarchist cookbook has been out in circulation for a long time and could do more damage than simple 3D plastic guns...
Most felons wouldn't have the resources or capability to learn how to "Mill" properly or read a damned micrometer properly anyways, gang-bangers "buy" their weapons, they don't play around building them. That is reserved for enthusiast, inventors and in for all intensive purposes "law abiding" citizens. The fears of these progressives has no foundation and is correctly identified by the judge! Want schematics from the Warsaw Ghetto uprising machine guns made from gas piping? Been around since WWII and you didn't see people running through the streets OK Corral style with machines guns like these sheep would have the world believe! Fuck them and their scared of shadow brains.