I've been running my M&P15 for about a year and its been absolutely flawless. I have started to take closer notice to the craftmanship of the fit. Maybe it's just mine, but there is noticeable wiggle at the foward pin of the lower receiver. Also, I still have the original sliding stock installed which isn't a tight finish. The final thing I've noticed is the angle beneath the trigger guard where the grip meets... it's close to a right angle and I wish there was more curvature. After several mags, my "finger" finger starts to hurt because of the upward pressure I place at that point. Are there any fixes for these little nuances? I assume that the wiggle from the pin and stock could affect the accuracy. If anyone has noticed the same things and corrected them, please let me know what you did. Thanks