Sen. Charles Schumer pushed a bill Sunday to fight a loophole allowing people on terrorist watch and no-fly lists to legally purchase a firearm.

The bill, the Denying Firearms and Explosives to Dangerous Terrorists Act of 2015, was first introduced by California Sen. Dianne Feinstein a few weeks ago. Schumer, who is one of the co-sponsors, said he hopes there is some action on it within the next month.

"We all know that the danger of terrorism has increased, particularly with the lone wolves," Schumer said. "Many of them are told, 'Buy guns. Go buy an AK-47 and go kill as many people as you can.'"

In 2014, 229 people on the terrorist watch list applied for firearm-related background checks and, of those, nearly 94% of them passed, Schumer said.

"The bottom line is very simple: with the new danger we have with terrorism we have to close every loophole," Schumer said. "It seems just outlandish that people on a terrorism watch list or on a no-fly list would be able to buy guns."