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 DurabilityFits 34mm tubeMedium heightPhosphated Black finish Sako TRG 34mm Medium Rings S130F973