From a quick check on S&W website, it looks like they discontinued a lot of model using the C.O.R.E dovetail cut. It does not match the M&P footprint as the C.O.R.E dovetail is much thinner than the M&P's. So for this it will vary on the model you have, but overall the C.O.R.E sights will not fit on a standard M&P dovetail and vice versa.