ok I have been wanting one since I felt it at shot show......but I have heard that S&W will be redoing the trigger and some internal parts on the M&P 45 is this correct? I dont want to buy one of the early ones if this is true.....is there a serial # range to stay away from? also I have a guy who is selling them with manual safety and night sights for $589 is this a good deal? if not who do you guys recommend? thanks!!