SonicSpike writes with this snippet from The Guardian: "As the technology to print 3D firearms advances, a federal law that banned the undetectable guns is about to expire. The New York senator Chuck Schumer says he is seeking an extension of the law before it expires on 9 December. Schumer said the technology of so-called 3D printing has advanced to the point where anyone with $1,000 and an internet connection can access the plastic parts that can be fitted into a gun. Those firearms cannot be detected by metal detectors or x-ray machines. Schumer says that means anyone can download a gun cheaply, then take the weapons anywhere, including high-security areas. The Democrat is pushing the extension along with Senators Patrick Leahy of Vermont and Bill Nelson of Florida. The effort was announced on Sunday."