Cody R. Wilson is a 25-year-old University of Texas law student working to build semiautomatic weapons using 3D printers. As depicted in this video, his efforts thusfar have concentrated on the part of an AR-15 semi-automatic rifle known as the lower receiver (the part whose sale and possession is regulated federally in the USA.)
Recently Cody’s company Defense Distributed has focused on the production of a 3D printable pistol. Dubbed The Liberator, they report having produced a working model and have released the CAD files. A short video as well as CAD files for The Liberator can be found at DEFCAD.