Audere Scope Rings PSR 30mm Gen III W/level High Black. In this latest generation this series sees improved reliability under stress conditions and the addition of a recoil lug a bubble level a new one-screw clamping system which speeds up the assembly. Specifications for Audere Scope Rings PSR 30mm Gen III: Manufacturer: Audere Finish: Hardcoat Anodizing Type III Ring Height: 37 mm Tube Diameter: 30 mm Quantity: 1 Ring Type: High Fabric/Material: 7075-T651 Aluminum Length: 6.6 in Weight: 191 g Color: Black Mount Type: Rail Dimensions: 2.15 X 4.70 X 6.60 in Features of Audere Scope Rings Psr 30mm Gen III Lightweight and durable scope rings ScopeLink interface for attaching multiple optical accessories Compatible with any 1913 or NATO rail Package Contents: Audere Scope Rings Psr 30mm Gen III Audere PR0008: Scope Rings PSR 30mm Gen III W/level High Black