There was a question asked here regarding 5" M&P slides. If you have a question, please PM me per forum rules. I get one post per day, so I'll go ahead and answer the question. I think the Mk V will work on the 5" slide. It was designed to work with slides with odd shaped features, as well as traditionally shaped slides. I don't have a 5" M&P to test, so I can't answer definitively. I have a post in the M&P section offering a sight change for anyone willing to send me their slide and new sights. I will update that post as well. Cost was questioned also. The Mk V costs $125 plus shipping. The M&P pin set adds $12. About the same cost as the MGW tool, but much, much more versatile.