Got the new M&P BG 380 auto w/o laser a few months ago: put about 250 rounds thru it then all of a sudden began to experience the mag release issue, my grip didn't suddenly changed, I thought perhaps it was the Mag, however, it did the same thing with all four of my mags....it would release after each round fired with or without the Mag extension, this went on for 75 rounds , ..............seems to me that plastic at that point of contact is wearing prematurely, perhaps S&W should look to a metal solution ............called S&W they are sending me a return lable