Absolutely (at the federal level). To put it the proper way, it has never been illegal to produce firearms for your own use. Don't sell it & don't make an illegal firearm (e.g. SBR without a stamp), but otherwise? Knock yourself out. (2/?)
Yup. It is entirely legal to print a firearm with a plan you have on your local machine, right now, before the whole "end of the world" thing tomorrow. (3/?)
Not technically, and not legally. The technical problem is that firing pins are almost invariably made of metal for a reason - you have to set off that primer. And plastic just can't have the strength to do that. (9/?)
Short of the firing pin and enough other steel to be legal, sure. And it's good for... about a maximum of ten rounds, from what I've seen so far, and marginally accurate at five yards, if that. They're proof of concepts, nothing more. (12/?)
Well, for example, AR-15 lowers do not have a significant amount of force or temperature applied to them at any given time. Given appropriate modifications, you could totally print a lower that's good for 100+ rounds, depending on materials. (13/?)
Remember "democratization of technology". The USSR abjectly feared mimeographs and other copy machines simply because they knew they couldn't control the flow of information - and that was /essential/ for socialsim to "work". (15/?)
I wholeheartedly believe in what they're doing, and in light of the ridiculous number of ridiculous injunctions and whatnot filed against them, do you?