People will blast me with the "it's cheap Chinese junk" arguement but I would suggest the same one I am setting up on my .223 build. Yes...it is Chinese and yes, it is fairly inexpensive but it is not "cheap" and definitely is not junk. These are the AR-15 Tactical Scopes from Centurion Tactical Gear. These offer BDC turrets, a variety of power ranges, illuminated reticules, very well made QD mounts, and a lifetime warranty. While my AR was being given a hair cut and having the carrying handle removed I put one of these on my FN/FAL figuring if it would perform with the recoil from the .308 it wouldn't be bothered by the .223 in the AR. I ran every test I run with a new scope including shooting several boxes with it, taking it off an putting it back on probably a dozen times without loss of zero, etc.The BDC adjustments seem to be spot on but I haven't checked them at long range but the raise the bullet impact the correct amounts at 100 yards (only range I have readily available to me at this time) This is a quality scope. I used the 1.5X4 power scope as this will be a SD rifle for me, set at 1.5 with the illumination on it is like using a red dot and 4 power is sufficient for the target sizes it is intended for at longer ranges. Also at 1.5 power I can look through the body of the scope and use the iron sights easily. The QD mount is very repeatable and very fast to remove and at the same time is very secure. I did a more complete review of this scope last year in this forum explaining the way I tested it. You can look at Centurion's offerings here...
http://www.centurion-tactical-gear.com/AR-15-Scope-s/380.htm