Primary Arms hit the jackpot when they created the ACSS. With their less expensive optics, it has proven to be a rock-star in the optics world and is so good that Trijicon themselves have picked up the reticle for inclusion in ACOGs – a move that I believe speaks volumes about the technical innovation of the scope and more importantly the character of those running the company.
*In my day-job, I have many interactions with Trijicon who has always been stand-up to work with.
MrGunsNGear breaks down the reticle barney-style. Watching it, there were even things I missed in its elegant design.