People have used lathes and other machinery to make their own guns. And the New York Post reported over a year ago that "Gilman Louie, a San Francisco venture capitalist who used to run the CIA's venture arm In-Q-Tel, said he used a 3D printer to make part of an AR-15 that would normally come with a serial number. Louie got around the restrictions with the help of his Makerbot printer…. Aside from the Makerbot printer, which costs $2,000, making the AR-15 was relatively cheap. Louie used one to two dollars' worth of plastic to print the gun part. After printing the piece, known as the lower receiver, Louie shelled out another $400 to $450 to complete the gun with unregulated parts he got from Amazon.com."