I noticed that the M&P Metal/M&P10/M&P9 Optics Ready all have the Shield Plus style trigger. I would much rather have that trigger on my M&P9C M2.0 than the Apex triggers. Is it possible to order the trigger from S&W? Like just the part? Or would I need a serial number form an O.R. or metal? Or will they just refuse to sell parts to anyone outside of a known gun smith? I am guessing that the M&P9 Optic ready is basically the same as the M&P9 M2.0 but with upgraded trigger and slide cut so I'm hoping it would be a drop in part.