MAGPUL MBUS Back Up Sight – REAR – MAG248 The MBUS (Magpul® Back-Up Sight) is a low-cost, color injection molded, folding back-up sight. The dual aperture MBUS Rear Sight is adjustable for windage and fits most 1913 Picatinny rail equipped weapons, but is specifically tailored to the AR15 / M16 platform. Made in the USA. SPRING-LOADED FLIP UP SIGHT Spring-loaded flip up sight easily activated from either side or by pressing the top Protective wings shield the dual, same plane flip apertures Sight can still be folded with either large or small aperture in position Detent knob easily and positively adjusts windage IMPACT-RESISTANT POLYMER CONSTRUCTION Polymer construction provides light weight and resists operational abuse DETENT AND SPRING PRESSURE KEEPS SIGHT ERECT Detent and spring pressure keeps sight erect but allows for unobstructed folding under impact, etc. CLAMPS TO MOST MIL-STD-1913 PICATINNY RAILS Clamps to MIL-STD-1913 Picatinny/STANAG 4694 receiver rail and provides the same height-over-bore as standard A2 irons RESOURCES MAG248 MBUS® Sight – Rear Installation Instructions E.A.R. Export Administration Regulations Controlled Product EXPORT NOTICE: This is an item controlled for export by the Export Administration Regulations (EAR) under the Commerce Control List (CCL). These controls take the form of export regulations and license requirements. As part of the express consideration provided for receipt of Magpul’s goods, technical data and/or services, you, our customer, acknowledge that the export, re-export or other transfer, directly or indirectly, of the goods, technical data and/or services provided by Magpul in violation of U.S. law is prohibited. Customers acquiring controlled goods, technical data and/or services from Magpul shall be responsible for obtaining any necessary U.S. or other government authorization required to ensure compliance with applicable export laws. (See Magpul Compliance Notices page for more information). WARNING: Observe safe firearm handling practices at all times. Failure to do so may result in serious bodily injury or death. Magpul Industries shall not be responsible for injury, death, or property damage resulting from faulty installation, misuse, illegal use, or modification of this product. TECHNICAL SPECIFICATIONS More Information Position Rear Height above rail, stowed ~0.51 in. Length, deployed 1.5 in. Length, stowed 2.6 in. Weight, w/ hardware 1.3 oz. Other Specs Center of aperture to top of rail: 1.42 in. WINDAGE ADJUSTMENT ~0.7 MOA (0.754″/100m) per click with a 14.5″ sight radius ~0.5 MOA (0.547″/100m) per click with a 20″ sight radius