Well, after looking at this site (among others) for the past two weeks, I decided to pull the trigger on an M&P C.O.R.E. 9mm today. I went into my LGS and all they had was a 5" 9mm core, 4.25" 40 core, so I went ahead and told him to do the 40 cal 4.25". The guy came back about 5 mins later (He...