I seem to remember quite a bit of adjustment range...did you actually try to adjust it over to co-witness the iron sights on your rifle?
If you did and it still didn't work, then I understand your frustration.
Yes I swear i tried. I turned the dial until I got resistance and it was not even close. I plan on trying it on another ar tomorrow and my buddy I got it from is gonna come check it out. Now I am more worried about hearing that botach wasnt the best place to order from.