The American Rifle Company M-Brace Scope Rings will hold firmly without marring or indenting the scope, even under the heaviest recoil. The uniquely split M-Brace rings maintain reticle alignment during scope installation while their low profile leaves the shooter with a clear view of the turrets. The M-Brace rings feature a rail interface which precisely and correctly engages rails, resulting in excellent return-to-zero performance. FeaturesEffortless anti-cant scope installationRecoil proof non-marring scope gripExcellent return-to-zeroDesigned to fit picatinny rail Scope ring height is from optical center line to top of railExtra High-1.42"High-1.26"Medium-1.10"Low-0.94"Extra Low-0.79"