Gallery: Fabrication Revolution

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3-D printed lower reciever of an AR-15 rifle. (3Dprinting / flickr)

"A more immediate threat is that digital fabrication could be used to produce weapons of individual destruction. An amateur gunsmith has already used a 3-D printer to make the lower receiver of a semiautomatic rifle, the AR-15. This heavily regulated part holds the bullets and carries the gun's serial number." -- Neil Gershenfeld, "How to Make Almost Anything"
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