"In this Oct. 3, 2012 photo, ""Wiki Weapons"" project leader Cody Wilson points to his laptop screen displaying an image of a prototype plastic gun on the screen, while holding in his other a weapon he calls ""Invivdual Mandate,"" in Austin, Texas. At least one group, called Defense Distributed, is claiming to have created downloadable weapon parts that can be built using the increasingly popular new-generation of printer that utilizes plastics and other materials to create 3-D objects with moving parts. Wilson says the group last month test fired a semiautomatic AR-15 rifle _ one of the weapon types used in the Connecticut elementary school massacre _ which was built with some key parts created on a 3-D printer. The gun was fired six times before it broke. (AP Photo/Statesman.com, )  MAGS OUT; NO SALES; INTERNET AND TV MUST CREDIT PHOTOGRAPHER AND STATESMAN.COM"
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