Ruger M77 Rifle Scope Rings are as rugged and dependable as the optics they’re intended to secure. Use as a high-quality alternative to ringmounts sold by firearms manufacturers and as a no-tap mounting method for most .22 rimfire rifles with an 11mm, 13mm or 3/8 inch dovetail rail. Superior integrity and tighter tolerances are achieved because they are machined from solid stock. Stainless Steel. 1.03 inches High.