OK, here is the deal, I just got off the phone again with S&W. Anyone who has recently asked for, or ordered a finger extension will receive a 9mm ext. Simply because they have made a mistake in marking, or identifying the difference between the 9mm and .40. To make things worse, they don't know the .40 stock number to correct the problem, so it could be a week or so before they get things straight. So until then if you have a 9c and need an extension free call S&W. But if you have a 40c, wait a couple of weeks.