Burris 410990 Ruger-to-Weaver Adapter Matte Black Ruger M77, Super Redhawk Weaver Ruger Integral Mount System Mount Steel Rifle
With this adaptor you can use Burris Zee Rings on your Ruger rifle or handgun. It properly anchors and aligns your scope so you can consistently put rounds on the target. Features a solid steel design, strong and lightweight. Compatible with Ruger firearms that feature the proprietary Ruger integral mounting system.