I'd say worst case scenario, you have to send it back to Sig. Maybe look for a gunsmith in your area.I managed to do the unthinkable and installed the half nipple upside down when switching?the sides of the mag release in my P226 with the mag catch stop in the incorrect position and now the mag catch is stuck in the down position. I realize that this is a serious problem and have only myself to blame. Any one know of a solution or know of any one who can fix this problem? I would hate to think that my pistol is now a fishing sinker.