Gregory's trouble with the law began on Dec. 23, when he interviewed the NRA's Wayne LaPierre on Meet the Press. In asking LaPierre about his controversial news conference wherein he suggested placing armed guard in every American school, but not doing anything about guns, Gregory asked, "So here's a magazine for ammunition that carries 30 bullets. Now isn't it possible that if we got rid of these, if we replaced them and said well, you can only have a magazine that carries five bullets or ten bullets, isn't it just possible that we could reduce the carnage in a situation like Newtown?"
Gregory was holding a 30-round magazine at the time (you can see it around the 9:50 mark in the video above). According to District of Columbia law, it is illegal to own something that holds more than 10 rounds at a time, even if it is not attached to a gun. While it isn't clear whether or not Gregory's magazine was real, it also isn't clear why Gregory would use a fake gun magazine as a prop.