Did not say, M&P sucked!! said S&W autos in general, suck. I've had 39 439 469 645 and 745 loose parts,poor triggers light primer hits is not new to S&W.
"Striker action pistols don't hit primers hard. With very little mass to the pin they rely on spring action for ignition which can be held back by any number of problems".
Never had this happen with a Glock 27,19,23,17,34 and 35 0r either of the 2 XD's I had.