Integration means stability. Browning's Integrated Scope Mount System unitizes the ring and base into a single, ultra-rigid unit. Machined from 7000 series aluminum alloy, they eliminate alignment problems and the possibility of a loose connection between the base and ring. Important: Compatible with Browning AB3 rifles only. They do not fit original A-Bolts or A-Bolt II receivers. Size 1" Type Ring Set Style 2 Piece Finish Matte Height 1.50" Series Scope Mount/Ring Combo Material 7000 Series Aluminum Mount Type To Receiver Tube Diameter 1" One Or Two Piece 2 Style Description Rifle