American Defense Manufacturing Cantilevered Dual Ring scope Mount 30mm Rings Black AD-DELTA-C 30 STD-TL. The AD-DELTA-C is a cantilever scope mount with 2" of eye relief built in. Top rail to scope center line height is 1.5" for 30mm Rings. 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. Horizontal split rings. It features the Patented QD Auto Lock Lever system to accommodate both in spec and out of spec rail systems. Specifications for American Defense Manufacturing AD-Delta-C Dual Ring Scope Mount: Manufacturer: American Defense Manufacturing Color: Black Tube Diameter: 30 mm Additional Features: Titanium Lever Condition: New Package Contents: American Defense Manufacturing AD-Delta-C Dual Ring Scope Mount American Defense Manufacturing AD-DELTA-C 30 STD-TL: Cantilevered Dual Ring scope Mount 30mm Rings Black