I have opwned three M&P compact pistols, one 9MM and two 40's. The first two, 9MM & 40 would drop the magazine upon firing about 50% of the time. Bought another 40 two weeks ago. This one the slide will prematurely lock back about 3 times on each magazine. 30% failure rate is unacceptable. Gun shop where I got it says turnaround for S&W warranty repairs is min 8 weeks. That stinks!