I have owed full size and compact M&Ps all in 40 cal., sold the full size because I could shoot the compact just as well. bought a shield in 9mm and could not hit anything with it. I put 600 rounds thru it and was ready to sell. I went to a friends and we shot many handguns that day, i was accurate with all of my guns and pretty good with his. After finishing up and putting everything away I remembered I brought the shield along, and told my buddy I was going to shoot the pistol I couldn't hit squat with, I could not miss with the shield that always shot low left for me. My friend says "now I will shoot the gun I cant hit squat with" thinking I saved the best for last. Not sure what happened or why things changed but I am real glad I never sold my shield, now my M&Ps are the 40c and the 9 shield both are EDC accurate enough for me