Myself and a couple of friends are traveling down to Smith and Wesson tomorrow to shoot in the USPSA match. It's about a 6 hour drive for us. At any rate, I have disabled the mag safety in my M&P. Will I get pinched for that? Will they let me shoot it, due to the fact that there are units built without the mag safety? I've never worried about it shooting club matches up in this neck of the woods, because nobody around these parts are familiar enough with the platform to know that it may have originally contained that "safety feature." I'm a little worried though, taking the gun back where it came from.