This mount from ADM is designed for putting the new Trijicon MRO directly onto the flattop of an AR-15 rifle, or any weapon which has a picatinny rail system. The mount places the MRO at the Co-Witness height. It is precision machined from 6061 T6 aluminum and finished in hard coat type III mil-spec anodizing. It features the QD auto lock lever system and is designed for maximum surface area contact with picatinny rail systems. Specifications and Features: American Defense MFG AD-MRO-10-STD Fits Trijicon MRO (Miniature Rifle Optic) Co-witness height Standard Lever Does not require proprietary tools for adjustment Can be adjusted with finger or flat head screwdriver Lever can be configured to lock to either the front or the rear Superior clamping surface to insure maximum rail engagement 6061 T6 Aluminum Type III hard coat anodized QD auto lock system Made in the USA Weighs 2.3 ounces Black