I just stopped by Primary Arms on Tuesday and bought their Aimpoint M-3 clone with cantilever mount. Haven't had a chance to try it out yet, but I've got it mounted fine. Used a drop of Threadlocker Blue to make sure it doesn't work loose, although with six mounting screws on their mount, I doubt it would have anyway.
Very sharp optics, and I really like having several dot styles to choose from. I tentatively chose the dot-in-circle as offering the quickest CQB, and will probably use the cross hairs or 2-moa dot for target shooting.
Was very well treated, and they answered all my questions completely. I will be buying their clone of the Millett DMS for my second AR.
