My M&P Pro C.O.R.E. has a poor trigger. I figure it is 6+ lbs. I got the ported Performance Center 9mm C.O.R.E. and it is not the same gun. The trigger has to be 2 lbs lighter. Melanite slide vs matte black on the 40cal, adjustable over travel, and of course porting. The difference in MSRP is only $43. If I had of known there was that much difference for so little money, I wouldn't have bought the Pro C.O.R.E. 40cal. A little due diligence on my part would have helped.