I can't seem to figure out how to get what I want in a PCC9 without spending a lot of money and sacrificing options. I would like to assemble, but willing to buy the rifle. I would like to use M&P mags and have a LRBHO. Preferably something modular that I can adapt if I ever get to where I outshoot the gun (not likely). It seems that some LRBHO are in the upper and some in the lower, making things incompatible. I would think I could assemble this for less than $850. Evidently not. Any ideas? Thanks.