If you do a search, there are many users that have discussed this configuration. See this link for an example: http://mp-pistol.com/boards/viewtopic.php?t=1802 I run Warren's on my M&Ps with a tritium front. I'm swapping the tritium for a High Viz fiber optic on my comp. .40. Check out www.mp-store.com for a good place to pick one up.