You found not ONE but THREE threads covering the same topic in under 30 sec. AFUKINMAZIN, SIMPLY A MAZIN
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This is A MAZIN
http://www.ar-15.co/members/2448-Mazin
Merged everyone of the 3-D Printer threads you all have pointed out. Thanks.
I just wanted to let you all know; You can print an AR-15 Lower, mags, parts, etc.!! If you don't believe me read the last 6 pages... Serious! With a 3d printer.......
Check em out now: http://www.defensedistributed.com/
Cool huh!