Burris&'; legendary quality continues into the XTB, Xtreme Tactical Bases! These bases are machined with close tolerances from solid steel, and feature an adaptable, reversible front base.Xtreme Tactical Bases are crafted from solid steel and engineered for maximum mounting flexibility and minimal height and weight. Mil-spec cross slots guarantee rock-solid attachment with any and all Weaver-style, Picatinny-style or mil-spec rings. Front base is reversible to provide multiple ring positions to accommodate various scope lengths.Specifications and Features:Fits Savage rifles with flat rear receiverSteel ConstructionMatte black finishWeaver style slotsReversible front baseBurris Part Numbers For XTB Bases:410600 Remington 700410605 Winchester 70+ Express410606 Winchester 70 Super Short410620 Savage with Flat Rear410615 Savage with Round Rear410625 Browning A-Bolt 410626 Browning A-Bolt Super Short410630 Tikka410331 Sako Dovetail (aluminum)