Ruger 90320 6K30HM Scope Ring Silver 30mm Extra High
https://www.tandktactical.com/shop/736676903207-ruger-90320-6k30hm-scope-ring-silver-30mm-extra-high-13554
https://www.tandktactical.com/web/image/product.template/13554/image_1920?unique=a7067f6
Designed to fit a scope with a 30mm scope tube diameter and a 52 MM objective diameter.
