The AD-MRO-L mount is designed for the Trijicon Miniature Rifle Optic and is the lowest mount we offer. It places the optic at a .99? centerline height. It is precision machined from 6061 T6 aluminum and finished in hard coat T3 Mil-Spec anodize. It features the Patented QD Auto Lock Lever system to accommodate both in spec and out of spec rail systems. The AD-MRO-L mount features the Patented QD Auto Lock Lever system which has the following advantages: Features a tactical lever upgrade with a quicker release, smoother movement and a sturdier design. Does not require proprietary tools for adjustment. Can be adjusted with your finger or a flat blade screwdriver. Lever can be configured to lock to the front or the rear. Superior clamping surface to insure maximum rail engagement. The AD-MRO-L mount is precision CNC machined from a block of 6061 T6 aluminum and finished in hard coat type 3 Mil-Spec anodize for a rock hard lasting finish. Precision machined from 6061 T6 Aluminum. Hard coat anodized for a lifetime of performance. Fully adjustable to fit both in spec and out of spec rail systems. American Defense MFG, LLC. products feature a lifetime warranty. Features the Patented QD Auto Lock Lever system. Made with pride in the U.S.A.