Magpul MAG1167-FDE MBUS 3 Rear Sight Flip Up in Flat Dark Earth. Polymer construction provides lightweight and durable performance. Features spring-loaded deployment with ambidextrous push-button. Sits at standard AR height when deployed and includes a rapid-select aperture system. Base configuration is Picatinny Rail. Manufacturer Magpul. Material Polymer. Color Flat Dark Earth. UPC 840815132202. Mfg. Part Number MAG1167-FDE. Condition New. Firearm Fit AR-10. This MBUS 3 is smaller than MBUS, sits at 0.44" high when folded and 1.15" wide when deployed.