Description ZR stands for Zero Recoil, so zero recoil! The only assembly that compensates for the recoil for the rifle scope almost 100% and thus prevents damage to the rifle scope. With 1 mm forward tilt and stop pin. Designed for powerful air rifles. Fits 11mm dovetail Fits 1″ and 30mm scope tubes (use included ring inserts for 1″ tube scopes) 4 hex screws per ring secure optics Overall length: 4.75″ Length of dovetail mount: 2.625″ 3 hex screws fasten the base 0.04″ droop compensation (approximately 1 mm) 100% recoil compensation Vertical scope stop pin Includes hex wrench
