In my experience with my M&P and M&P Pro, the slides will almost invariably close when the magazine is seated. It seems to be more probable if the magazine is fully loaded. One should always be aware that the slide may not close automatically.
Mine did not drop automatically, once. It caused me to stumble a second. I think it is a function of how smartly you slap the fresh mag in. I give it a good slap as I seat it, now, which is probably good procedure with all mag seatings.




















































