The House has approved a measure to extend the ban on manufacturing plastic guns for another 10 years. The ban was first imposed in 1988 for all plastic guns undetectable to security screening machines. It had been set to expire this month. The House measure is the first piece of federal gun legislation to be approved since the Newtown school massacre a year ago. It will likely be the only gun control measure to pass Congress this year after the Senate failure to expand background checks and ban assault rifles in April.