New to hand guns and the m&p 9 fs. I was having accuracy troubles, so decided to practice with dry firing tonight. I checked to make sure the mag and gun were clear, re inserted the mag, and cocked back the slide. The slide locked back on its own, and that makes sense to me seeing as the mag was empty but for some reason I don't remember it doing that before. Is that normal? Thanks guys, sorry for the dumb questions. Is it just paranoia from reading about the problems people have? Lol