Precision Machined from Aircraft-grade Aluminum Alloy with Anodized Black Matte Finish * Complete with Stop-pin for Rock Solid Applicatio * Ring Base Designed with Locking Hex Screws to Tightly Fit on Mounts with Airgun/.22 Dovetail Dimensions * Reversible Locking Plate to Fit Full Range of Airgun/.22 Rails * 38mm Bi-directional Offset Provides Extended and Comfortable Eye Relief