Don't bother
I ordered this sight set and at first was pleasantly surprised since they are made by Trijcon, but after installing the rear sight, a portion of the striker safety cover was still exposed, and this could be a potential problem if anything were to work it's way in there. the base of both front and rear sight taper to a point and seem to be soft, so they deformed easily when installing with a brass or polymer punch, if your going to use these sights you may want to get a special installation tool so you don't deform the sight and mar the finish of you M&P Shield 9/40. I am going to call Brownells and see if I can return the sight set, for me they may cause a problem if I ever have to use my gun, but it won't fire because my striker safety has dirt or dust in it.
