UTG 30mm/2PCs Med Pro Max Strength Picatinny Rings,22mm Wide 4-screw Low Profile "Tiger" Ring, hined From Aircraft Aluminum Alloy with Maximum Strength Twist Lock Design for Quick and User Friendly Easy Installation Light Weight with See-through Tunnel and Slot Cut on Ring Top, High Quality Synthetic Protective Tape on Rings Inner Surface to Protect Your Equipment Optimized Dimensions for Best Fit on All Picatinny/Weaver Rails Strong Recoil Stop Cross Bolt for Optimized Fit and Zero