American Defense Manufacturing is a leader in mounting solutions for a variety of optics, lights, lasers, and acessories for firearms. The proprietary Quick Disconnect Auto Lock system is unrivaled when it comes to locking,adjustable quick disconnect mounts. The QD Auto Lock system can be easily adjusted with just your finger, configured to lock to the front or the rear, and has a superior claming surface to insure maximum rail engagement. The AD-DELTA-C mount is made for putting high power glass onto a flattop style AR-15. The AD-DELTA-C is a cantilever scope mount with 2" of eye relief built in. Ring spacing is the same as the AD-Recon mount. It is precision machined from 6061 T6 aluminum and finished in hard coat T3 Mil-Spec anodize.. It features the QD Auto Lock Lever system to accommodate both in spec and out of spec rail systems. Specifications and Features: Precision Machined From 6061-T6 Auminum Mil-Spec Type III Teflon Hardcoat Anodized Scope Diameter: 34mm Centerline Height: 1.55" Offset: 2" Weight: 9oz Ring Width: 0.98" Separation Inner: 2.52" Separation Outer: 4.48" QD Auto Lock Lever System Titanium Levers Black