Comment Re:Good old Cody (Score 1) 338
Yeah the plastic 3d printer gun plans are just a distraction mostly for people with irrational fears and little knowledge of guns. The gun parts schematics for receivers and the precedents are more interesting. That a AR is defined by the lower unit and everything else is considered a gun accessory and thus production and distribution is not regulated in the US; this leaves the possibility of lowering the bar for a reliable high rate of fire ghost gun may soon be down to a design where you can pickup a few unregulated parts, print a receiver (that probably doesn't look at all like a weapon) at the local libraries 3d printer and snap together a legal near military grade weapon in a afternoon (and perhaps even allow a auto fire modification, that is mostly illegal today, with no tools.)
As a lower receiver that holds together a metal barrel and firing pin, etc; theoretically would have no requirement to be stronger than what a 3d printer is capable of printing in plastic.