UTG 30mm Flip-to-Side, Picatinny/Weaver QD Ring Mount Fits Magnifiers or Other Accessories with 30mm Tube Diameter, 40mm Center Height Ensures Compatibility with Many Popular Dot Sights Picatinny/Weaver Compatible Mounting Base with Patented Quick-detach Lever Lock for Rapid and Secure Installation Complete with 2 Inserts to Use with a Wide Range of Flashlights or Other Accessories with 30mm, 27mm or 1" Diameter Precision Machined From Aircraft-grade Aluminum Alloy with Anodized Black Matte Finish Patented, Innovative Flip-to-Side Design Allows Target Acquisition at Varying Distances and Flexible Position of Accessory