The Warne Mfg 1R7M Ring Set: These meticulously machined rings assure precise fit and function due to each firearm manufacturer's unique mounting rail design. The superior craftsmanship of Warne Ruger Rings allows for a seamless fit onto the receiver's dovetail, eliminating the need for a mounting base. A Ruger-specific, scalloped recoil control key ensures positive engagement between the ring and receiver dovetail. The design employs four T-15 Torx style socket cap screws, guaranteeing secure and permanent optics attachment. This fixed ring set is compatible with the tapered receiver style of Ruger models M77, Hawkeye, and Super Redhawk, and is provided in two distinctive heights for alignment with your firearm\'s tapered mounting surface.