I just picked up an M&P Pro and from looking at the barrel pictures it is the older one. It only had 50 rounds through it when I got it, which was just yesterday. I shot it this AM. I went 5 yards to about 50 with two shots each at 5,10,15,25 and 50. There were 8-A zone hits and 2-C's just outside the A. I would say accurate enough. First time with an M&P. I have only shot 1911's or 2011's for the most part so big trigger difference.
Just my experience,
SR