Look at the 10-8 Performance website. They make a couple of difference front sight heights for the M&P. I know they address the long slide versions as needing different heights than the standard versions. I think the standard front sight height is .160 and .180 is an option. They're competetion oriented, and if you have a question, give them a call. Heinie also may offer some options, and they're probably my favorite although my M&P 45 wears the 10-8s.