I've had two of their stocks and didn't have any problems from using them. I did have to put in a lot of time to fit them to the rifles, even though they were supposed to be molded for the action. That said, it is of note that I'm no longer using them. One I just never liked because the stock didn't fit well so it wasn't used for long. The other was on my 358STA for quite a few years and saw a lot of hard use. It was an A-Square hamilcar stock molded for the M70, but built to A-Square's specifications(MPI supplied A-Square's factory synthetic stock). I never had a problem with it, and like the way it shot, but always felt it was too bulky for carrying around all day. If you've ever handled an A-Square rifle, you know what I mean (feels like carrying a 4X4 post around).
Oh, both of those MPIs were replace with McMillans, for what it's worth.
