The Leapers® UTG Super Slim MRO® Mount is a Absolute Co-witness AR-15 mount. The UTG MRO Mount Is Precision CNC Machined from 6061-T6 Aircraft Grade Aluminum and matte black hard coat anodized. Mounts 0.73" Saddle Height Positions MRO®/MRO® Patrol at the Correct Height for an Absolute Co-witness in line with Standard Height AR Iron Sights. Mount Utilizes a Locking Torx Screw and Square-shaped Integral Recoil Stops for a Secure Zero Hold. MRO mount has Significant Lightening Cuts Reduce Overall Weight and Bulk. Includes MRO®/MRO® Patrol Mounting Screws and Installation Tools.