Leupold 1-Piece Mark 4 8-40 Adaptable Steel Scope Base 20 MOA - Weatherby Vanguard / Mark V LA , Matte Black

Leopold MARK 4 8-40 Adaptable Mounts - Leupold_s Mark 4 8-40 Adaptable Mount is the first mount that can accommodate both the 8-40 screw and a modified 6-48 shoulder screw. Larger through holes accept the thicker 8-40 screw increasing mount strength by 41 percent, while the standard 6-48 screw has been replaced by a shoulder screw to work with the larger opening. This gives you the flexibility to mount your rifle with the common 6-48 screw size, or drill and tap your gun to accept the 8-40 screws. BASES Available for virtually every long-range tactical rifle, Mark 4 bases accept Mark 4 rings, cross-slot, and QRW/PRW rings. One-piece bases have a 20 MOA slope for long-range shooting applications. RINGS Available in machined aircraft-grade aluminum or StrikeForged steel options, Mark 4 rings can be installed on any AR/ MSR platform or any firearm with a Picatinny-style base. They_re strong, lightweight, and exceptionally durable.