While many call for tighter firearm restrictions, a University of Texas law student believes technology is about to make such regulation irrelevant.
Cody Wilson, 24, is the project leader of Wiki Weapons, a group that's working to create a gun you can download from the Internet and output on a 3D printer.
A New York congressman says the prospect of such guns becoming reality is reason enough for the renewal of the Undetectable Firearms Act, which makes it illegal to build guns that can't be detected by X-ray or metallic scanners.
YouTube video shows Wilson's group test firing a semiautomatic AR-15 rifle -- one of the types of weapons used in the Connecticut elementary school massacre.
Wilson says they printed a plastic lower receiver of a rifle with a 3D printer, attached it to a real gun and fired six rounds before the plastic piece broke.
"Now what I'm doing is showing people, ok, this is something that can be done right now with this technology, and we're changing this in the software, and we're making modifications and customizations and testing with different rounds and different guns, but what we make won't look like a plastic AR-15. What we make will just be the gun at its most essential, something that just is a firearm practically speaking," Wilson said.
No independent observer verified the test firing.
Federal firearms regulators said they are aware of the technology's gun-making potential but do not believe an entire weapon has yet been made.