I got one of the first M&P10's that were released. I was so impressed with it I bought another.
First day on the range and 10 rounds to dial in the scope I was shooting sub MOA out of a new barrel using hand loads I did not develop for this rifle.
What makes the M&P 10 such a nice rifle is the lower and the weight. Ambidextrous everything which was really nice and the reduced weight of the barrel after the gas block helped with balance with my quicksand suppressor installed.
I would not complain about the cheap fixtures, I'd rather buy a rifle with junk fixtures on it and buy the fixtures I want than pay extra for the rifle with high $ fixtures I don't want.
The lower and bolt are proprietary so you will not be swapping those out... but with sub MOA right out of the box, why would you want to?
I did not see any need to swap out the trigger, it felt pretty decent and considering I have Wilson Combat triggers in all of my other AR's, this says something about the factory trigger. Definitely not a WC but sub MOA speaks for itself.
I get some really good deals on my guns and I have never seen a M&P for less than $1,400.00 The average I have seen is $1,550.00. Even at $1500 this rifle is a good deal. Definitely the best off the shelf for the money.