Done recently: http://www.extremetech.com/extreme/145664-3d-printed-30-round-ar-magazine-brings-us-ever-closer-to-a-fully-3d-printed-gun http://www.extremetech

Done recently: http://www.extremetech.com/extreme/145664-3d-printed-30-round-ar-magazine-brings-us-ever-closer-to-a-fully-3d-printed-gun http://www.extremetech.com/extreme/145664-3d-printed-30-roun...