Magpul MBUS PRO Steel Backup Sights, Rear Sight , Black

All steel construction; Steel, rectangular sight post selectable between Match and Standard widths (.040” Match width for increased precision; .060” Standard width for maximum visibility) Case hardened and finished with Melonite QPQ for extreme resistance to wear and corrosion Mounts on any MIL-STD-1913 Picatinny/STANAG 4694 rail. Windage Adjustment - ~0.5 MOA (0.566 inch/100m) per click with a 14.5 inch sight radius. ~0.4 MOA (0.410 inch/100m) per click with a 20 inch sight radius Elevation adjustment knob – no tools required Positive detents in both the up and down positions as well as on the elevation knob; Standard sight height when deployed