Magpul Mbus Pro LR Adjustable 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 Elevation adjustment wheel for 200-600 meter distances in 50 meter increments Positive detents in both the up and down positions; standard sight height when deployed