I have a TLR-2 that was on a HK P2000 and is now on one of my M&P 9mms. I has held its zero perfectly and was a simple matter to rezero when moving it to its new home. That being said, when the laser grips come out for the M&P I will be getting 2 or 3 sets. If you would like my used TLR2 I'll make you a deal.