The AD-DELTA mount is made for putting high power glass onto a SCAR or flattop style AR15/AR10. The AD-DELTA is a straight up scope mount with no eye relief built in. Top rail to scope center line height is 1.475 inches for 1 inches rings and 1.5 inches for 30mm rings. It is precision machined from 6061 T6 aluminum and finished in hard coat T3 mil spec anodize. Horizontal rings. Adapted to the FN SCAR program, approved by SOCOM. NSN 1005-13-121-5535 It features the patented QD auto lock lever system to accommodate both in spec and out of spec rail systems. Features: The AD-DELTA mount features the patented QD auto lock titanium lever system 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 Hard coat anodized for a lifetime of performance Fully adjustable to fit both in spec and out of spec rail system Made in the USA Lifetime warranty