I Made an Untraceable AR-15 ‘Ghost Gun’ in My Office — And It Was Easy

Monday, June 15th, 2015

Andy Greenberg decided to make an untraceable AR-15 ghost gun — that is, to finish off an 80-percent-finished AR lower, which isn’t legally a gun yet — three different ways:

I would build an untraceable AR-15 all three ways I’ve heard of: using the old-fashioned drill press method, a commercially available 3-D printer, and finally, Defense Distributed’s new gun-making machine.

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