Great product - LaserMax Smith & Wesson M&P 9mm and .40 cal & .357 caliber

Read some reviews about how this didn't fit newer model M&P's but took the chance anyway. fit tight at first harder then the factory spring to get in. and had a little trouble with the slide going back on, but none the less after a couple times breaking the gun down it now slides right on with out a hiccup. easy to turn off and on with very sterdy parts
Pros: Aims Right on, Easy to install, No bulky attachments sticking off the gun
Cons: Its Expencive compared to other lasers on the market

This review was written in the old system and had content requirements that are different than reviews written today.