If I understand correctly the 9mm barrel is thicker to fit the slide. So if the frame is identical, this doesn't seem unreasonable. If the slide were different, there would be no need to have a thicker barrel in 9mm.whtvrsclvr said:something sounds wrong here. I still don't think you'd be able to upgrade a 9mm to a .40. Don't get me wrong, I'd love it and would buy one... just seems off a bit.
It would seem if one works than the other would as well.NExd said:would buy a SC if a .357 sig barrel became available