Leapers UTG Super Slim Picatinny RMR Mount Absolute Co-Witness Black. 0.87 Saddle Height 1.78 in Length. Specifications for Leapers UTG Super Slim Picatinny RMR Absolute Co-Witness Mount: Manufacturer: UTG Pro Color: Black Finish: Matte Black Anodize Gun Make: Universal Gun Model: AR-15 Gun Type: Shotgun Rifle Fabric/Material: 6061-T6 Aircraft Grade Aluminum Co-Witness: Absolute Red Dot Sights-Footprint: RMR Optic Cut: Not Applicable Hand: Ambidextrous Length: 1.78 in Width: 1.1 in Height: 0.87 in Weight: 1.5 oz Condition: New Additional Features: 0.87in Saddle Height Positions Includes RMR Mounting Screws and Installation Tools for a Simple and Friendly Installation Significant Lightening Cuts Reduce Overall Weight and Bulk Utilizes Locking Torx Screws and Square-shaped Integral Recoil Stops for a Secure Zero Hold Precision CNC Machined from 6061-T6 Aircraft Grade Aluminum and Finished in a Matte Black Anodize Quantity: 900 Gun Rail: Picatinny Package Contents: Leapers UTG Super Slim Picatinny RMR Absolute Co-Witness Mount Leapers MT-RMRAC: UTG Super Slim Picatinny RMR Mount Absolute Co-witness Black