UTG Universal Dovetail to Picatinny/Weaver Adaptor New generation cantilever design rail adaptor Universal fit for both flat and rounded dovetail receivers Fits 11mm airgun/shotgun dovetail rails (will not fit rails smaller than 11mm) Extended 5.71" picatinny top rail with 14 slots provides flexible eye relief adjustment and mounting flexibility for various optics Equipped with 4 high strength screws and adjustable recoil resistant stop pins to ensure solid locking and zero holding Designed to resist bidirectional recoil force Quick and easy slide-on installation Precision machined from aircraft aluminum Hard coat anodized matte black finish Saddle height is minimal 0.59" Weight: 2.4 oz. Width: 0.84 in.