All steel construction; Case hardened and finished with a ferritic nitrocarburizing process for extreme resistance to wear and corrosion; Mounts on any MIL-STD-1913 Picatinny/STANAG 4694 rail including receiver-height gas blocks; Elevation adjustment knob - no tools required; Positive detents in both the up and down positions as well as on the elevation knob; Standard AR sight height when deployed