The new Optilock scope mounts offer design that perfectly compliments Sako manufactured rifles. The Optilock scope mounts have new features making this famed scope mounting system the choice for ultimate accuracy. The ring insert is made of polymer and protects the scope tube from deforming. Features: Built to match the beautiful classical design of a sako rifleHighly AdjustableUnrivaled DurabilityPolymer insert ringFits 1 inch tubeExtra Low 28.5 mm heightBlack finish Sako Optilock Blue 1" X-Low Rings S1300923