"Here is 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 asked, referring to the December 14 shooting in which a gunman massacred 20 children and 6 adults at Sandy Hook Elementary School in Connecticut.
LaPierre replied: "I don't believe that's going to make one difference. There are so many different ways to evade that even if you had that" ban.
It was not clear how or where Gregory obtained the magazine, and an NBC News spokeswoman declined to comment Wednesday.
"Meet the Press" is generally taped in Washington.