Ruger M77, Super Redhawk Ruger-To-Weaver Base Adapter
by Burris
In stock at Brownell's
on 9-21-2017.
Product Description

With this adaptor, you can use Burris Zee Rings on your Ruger M77 rifle or Super RedHawk handgun. It properly anchors and aligns your scope so you can consistently put rounds on the target.