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 the USA.Melonite Finished All Steel Construction: Case hardened and finished with Melonite QPQ for extreme resistance to wear and corrosionWindage Adjustment Knob: No tools requiredSnag-Free, Tucked Away Profile When Stowed: Postiive detents in both the up and down positionsLow Profile When Deployed: Standard AR height over bore when deployed, 45 degree offset to the right-hand sideSpecifications:Position: RearHeight Above Rail, Stowed: 0.18"Length, Stowed: 2.0"Weigt, w/ Hardware: 2.0ozOther: Mounts on any MIL-STD-1913 Picatinny/STANAG 4694 railNOTE: Only compatible with MBUS Pro offset Front Sight MAG525Small Aperture Diameter: 0.07"Large Aperture Diameter: 0.19"Windage Adjustment:0.5 MOA per click with a 14.5" sight radius0.4 MOA per click with a 20" sight radius