The Warne® Scope Mounts 20 MOA 30mm Extended Skeletonized Scope Mount is a lightweight cantilever-style mount, designed to deliver lasting field performance and improved accuracy on long-range targets up to 600 yards out. Constructed of CNC-machined 6061 aluminum with a corrosion-resistant finish, this mount offers superior eye relief and clarity on long-range targets. Better yet, this scope mount is equipped with hex-style cross-bolt nuts for added stability and frustration-free installation on most flat-top, Picatinny-style rails.