I had the opportunity to shoot an M&P Shield 40 last weekend. My wife and I were at the range in Concord shooting her M&P 40c and a guy sets up next to us with a Shield. He said because he was in law enforcement he was able to get a non California version from out of state. That shield has a bit more kick than my wife's compact. I would like to shoot about 50 rounds through it before I made a decision to buy one in a 40.