I few weeks ago I was able to trade my slightly used Glock 35 for a M&P 5" Pro CORE. Just got back from the first trip to the range with a dual illuminated RMR with & MOA amber dot, and all I can say is wow!! From the rest, I was able to make 2"-2 1/2" ( all rounds on 1/2 of a 4" target spot at 25 yards) five round groups on paper. Firing from my stance, I need a lot of work since having the dot now shows how much I'm moving around during my trigger squeeze. Not a thing wrong with this setup that about 1-2K more rounds through it wont fix. Not a single hick up with feeding or functioning with Winchester WB 165grain, Speer Lawman 180 grain, and American Eagle 155 grain full metal jacket rounds.