Leapers UTG Super Slim RDM20 Mount Absolute Co-Witness Black. 0.78 Saddle Height 1.84 in Length. Specifications for Leapers UTG Super Slim RDM20 Mount w/Absolute Co-Witness: Manufacturer: UTG Pro Color: Black Finish: Anodize Fabric/Material: 6061-T6 Aircraft Grade Aluminum Co-Witness: Absolute Red Dot Sights-Footprint: Docter Optic Cut: Not Applicable Condition: New Additional Features: w/Absolute Co-Witness Features of Leapers UTG Super Slim RDM20 Mount w/Absolute Co-Witness: Precision CNC Machined from 6061-T6 Aluminum and Finished in a Matte Black Anodize 0.78" Saddle Height Positions the UTG RDM20 Reflex Micro Dot at the Correct Height for an Absolute Co-witness in Line with Standard Height AR15 Iron Sights Utilizes Locking Torx Screws and Square-shaped Integral Recoil Stops for a Secure Zero Hold Significant Lightening Cuts Reduce Overall Weight and Bulk Includes Mounting Screws and Installation Tools Package Contents: Leapers UTG Super Slim RDM20 Mount w/Absolute Co-Witness Leapers RDM-20AC: UTG Super Slim RDM20 Mount w/Absolute Co-Witness Matte Anodize Black