A while back I caught a TV show in which Jay Leno was showing a TV crew his collection of cars & other funky gadgets.
One such gadget was a 3-D laser printer: AMAZING BIT OF KIT - GOING TO TOTALLY CHANGE THE 21ST CENTURY - AS IN, ON A PAR WITH THE TELEPHONE, TV SET, JET ENGINE, ETC.
JUST seen an article on the AR15 forum. http://www.ar15.com/forums/t_3_118/5799 ... age=1&sr=0
Someone has printed an AR15 lower receiver! clapclap

Click on the article and read through it - quite a few more details, photos and links to study...
Off to sell some body parts and buy shares in a 3-D printer technology company