IIRC, you either need a shorter front sight or a taller rear sight to raise point of impact. I'm not familiar with the M&P, so don't know what your options for accomplishing this are. You may want to contact S&W and see if they have different height sight blades available. If your pistol has night sights, you need to know who manufactures the sights and contact them about different height sights. A friend of mine was having problems with a H&K USP shooting high so we put the tallest front sight on it that was available. It was still shooting a little high and it turned out that what he was doing was still using the top of the sight post as the aiming point instead of the "dot" on the sight. By using the dot, it tends to cover up the bullseye with the front sight, but point of impact was dead on.