Audere Scope Rings Psr 30mm Med 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 Med: Manufacturer: Audere Finish: Hardcoat Anodizing Type III Ring Height: 34 mm Tube Diameter: 30 mm Quantity: 1 Ring Type: Medium Fabric/Material: 7075-T651 Aluminum Length: 6.55 in Weight: 179 g Color: Black Mount Type: Rail Dimensions: 2.15 X 4.75 X 6.55 in Features of Audere Scope Rings Psr 30mm Med 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 Med Audere PR0007: Scope Rings Psr 30mm Med Black