After reading many posts regarding issues with M&P accuracy and trigger action, I have a question. Being new to the addiction, how do I know WHEN to begin investing in aftermarket parts for my M&P? Would an aftermarket barrel and competition trigger assembly benefit me now or should I wait until I know that it is my handgun that is holding me back? The disadvantage, it would seem, in waiting is having to adapt to a different trigger than I've run up until that point.