Scopes are only as good as the rings they are mounted in. Seekins Precision Scope Rings are the best available through superior design precision machining and obsessive attention to detail. Built to the 1913 Picatinny Specification from 7075-T6 aluminum. Ring heights are: 0.82 inches Low, 0.87 inches Medium, 0.92 inches Medium high, 0.97 inches High, 1.26 inches High, and 1.4 inches AR high. Features: AR high height (4) screw cap Grade 8 T-25 Torx fasteners Serialized pairs