Well I went to pick up a M&P 10 today. I got home opened to look it over good and load up to shoot. I put the mag in and it wouldn't come out. I instantly got mad and thought I got a defective gun. After I calmed down I took another look and I smacked the side of the lower and the mag feel out. With the mag I could see the catch was moving freely if took a little punch and pushed the pin for mag release. About an hour later it hit me its a California gun with a bullet button. I'm in West Virginia. Anyone have any suggestions??? Contact s&w and tell them or play stupid and say its broke.