I have mine mounted on my colt 6920, great in bright day light, the mount is very nice and I rarely ever hear owners mention but the mount is dual height capable. I run a vltor casv forend that mounts to the top rail of my receiver, there by putting my iron sights and my scope at 2 different heights compared to standard AR mounts, remove the filler plate and boom co witnessed perfectly with out trying to source an exotic expensive mount. the only down side is the clutch drive thumb screw does stick out a little but that is more then made up for by the repeatable zero upon reattaching the sight. its hard to find a true rough and tumble battle proven sight and mount for the same price...