To be able to access all of
needs to be enabled.
I have three 1911R1 Enhanced pistols with this rear sight. Out of the box two of them would not adjust low enough to shoot point of aim. The adjustment screws were bottoming out. I removed the adjustment screws and shortened them a bit on those two. Voila! Right on. This sight provides the opportunity to adjust the POI where you want it with different loads. Great for target shooting, winning turkeys and everything else.