An NBC News anchor is under investigation in Washington, D.C., after displaying an ammunition magazine on the weekly show “Meet the Press.” NBC News host David Gregory held up the 30-bullet gun cartridge as he interviewed NRA head Wayne LaPierre.

David Gregory: “So here is a magazine for ammunition that carries 30 bullets. Now, isn’t it possible that if we got rid of these,” [he then sets it down and picks up a smaller one] “if we replaced them and said, 'Well, you could only have a magazine that carries five bullets or 10 bullets,' isn’t it just possible that we could reduce the carnage in a situation like Newtown?”

Wayne LaPierre: “I don’t believe that’s going to make one difference.”

D.C. police say Gregory and NBC may have violated local laws barring possession of a “large capacity ammunition-feeding device.”