The new MBUS Pro LR capitalizes on the low profile and sleek styling of the original MBUS Pro, while adding the additional feature of an elevation adjustment wheel to accurately engage targets at variable distances. Built with all steel construction, this is the sighting solution that delivers no-tool adjustments, maximum strength, corrosion resistance, and functionality in a compact package. Positive detents keep the MBUS Pro LR at standard AR sight height when deployed and so low when stowed that you will hardly notice them. Made in U.S.A.Features:All steel constructionCase hardened and finished with Melonite(TM) for extreme resistance to wear and corrosionMounts on any MIL-STD-1913 Picatinny/STANAG 4694 railWindage adjustable with low-profile knob - no tools requiredElevation adjustment wheel for 200-600 meter distances in 50 meter increments*Positive detents in both the up and down positionsStandard AR sight height when deployed Specifications:MBUS Pro Offset - RearWeight, w/ hardware: 2.0 oz.Height above rail at clamp: ~0.18"Length, stowed: 2.0"Small aperture dia.: 0.07"Large aperture dia.: 0.19"