Magpul

-All steel construction-Case hardened & finished with Melonite QPQ™ for extreme resistance to wear & corrosion-Mounts on any MIL-STD-1913 Picatinny/STANAG 4694 rail-Windage adjustable with low-profile knob – no tools required-Positive detents in both the up & down positions-Standard AR sight height when deployedElevation Adjustment:0.5 MOA (0.566"/100m) per click with a 14.5" sight radius0.4 MOA (0.410"/100m) per click with a 20" sight radius