Senate rejects tighter curbs on undetectable guns

This photo taken May 10, 2013 shows Cody Wilson holding what he calls a Liberator pistol that was completely made on a 3-D-printer at his home in Austin, Texas. Congress is extending a ban on plastic firearms that can slip past airport and school metal detectors and X-ray machines, a bittersweet moment for gun control advocates just before the first anniversary of the mass killing at a Connecticut elementary school. (AP Photo/Austin American Statesman, Jay Janner) AUSTIN CHRONICLE OUT, COMMUNITY IMPACT OUT, INTERNET MUST CREDIT PHOTOGRAPHER AND STATESMAN.COM

WASHINGTON (AP) — The Senate has rejected a Democratic effort to tighten restrictions against undetectable plastic guns.

But it is also about to send President Barack Obama a 10-year renewal of an existing ban against firearms that can evade metal detectors and X-ray machines.

Republicans used a voice vote Monday to defeat a proposal by New York Sen. Chuck Schumer requiring that plastic firearms have a permanent piece made of metal.

Current law forbids undetectable guns. But some makers include a metal part that can be removed.

Democrats say stricter curbs are needed because technology is improving and costs are dropping for 3-D printers, which can make guns. Republicans say there's time to study that idea.

The House approved a 10-year extension last week. Without action, the prohibition would expire Tuesday.