Building on the proven MBUS Pro platform, the MBUS Pro Offset Sights are part of an an effective aiming system to supplement magnified optics on M1913 Picatinny mounting surfaces. In the event of a damaged or nonfunctional primary optic, or a close target, rotating the rifle 45 degrees provides the shooter with a fully-featured iron sighting solution. The MBUS Pro Offset Rear Sight features durable Melonited steel construction, positive detented lockup when deployed, tool-less windage adjustment for easy zeroing, dual rear apertures, and a low profile footprint to ensure compatibility and reduce interference with most rifle setups. Made in U.S.A.Features:All steel constructionCase hardened and finished with Melonite QPQ(TM) for extreme resistance to wear and corrosionMounts on any MIL-STD-1913 Picatinny/STANAG 4694 railWindage adjustable with low-profile knob - no tools requiredPositive detents in both the up and down positionsStandard AR height over bore when deployed, 45 deg. offset right-hand side 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"