The Warne™ 1 inch Ruger M77, PA, Med Matte Rings are able to fit right onto the receiver’s dovetail with no need for a mounting base. 
The Ruger Fixed Rings are available in two different styles to fit either the Ruger #1 receiver design (which includes the Blackhawk and Mini 14 models) or to fit the tapered receiver style like the Ruger M77, Hawkeye & Super Redhawk. The Ruger M77 style rings are packaged as two different heights to accommodate the tapered mounting surface on this firearm. Lastly, the Ruger Fixed Rings utilize 4 T-15 Torx style socket cap screws for secure and permanent optics mounting.

Features:

• Permanently attaches to base.
• Ruger specific scalloped recoil control key for positive engagement of ring to receiver dovetail.
• Rings securely mount around scope using 4 Torx style T-15 socket cap screws, 25 in/lb. of torque recommended.