The massive strength of a wide 6-screw ring is combined with lightweight yet thick cross section aluminum to provide a reliable return-to-zero ultra strong mounting system for Picatinny-style rails. Available in four heights from 1/4" to 1", these Xtreme Tactical Rings are ready for the heaviest of scopes, massive recoil, and severe usage. Ring HeightsThe dimensions of BurrisTactical rings from the bottom of the scopetube to the top of the mount face (“C” dimension): LOW .25" MED .5" HIGH .75" EXTRA HIGH 1"