Didn't think it was that expensive! I've printed 100% AR lowers with a $160 printer. FCGs are also printable so it's just springs. If you are crafty you can rifle your own barrels with a form of primative EDM.Zerohedge
ZeroHedge - On a long enough timeline, the survival rate for everyone drops to zerowww.zerohedge.com
You Can Now 3D Print an Entire Semi-Automatic Rifle at Home
A 3D-printed weapons community is about to release plans for a new assault rifle.futurism.com
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BGC to have a 3d Printer?
Buy springs?