Evolution Outdoors Scope Base Features The Evolution Gun Works Scope Base is machined from 6061-T6 extruded aluminum a lightweight yet strong alloy commonly used in precision rifle components for its combination of durability and low weight. The matte black finish applied to the base cuts down on glare in the field while resisting wear from repeated handling and mounting hardware installation. Built with a flat 0 MOA profile this base is intended for shooters who do not need built-in elevation compensation and simply want a solid reliable mounting platform. Its Picatinny rail pattern conforms to the Mil-STD 1913 standard giving it broad compatibility with Picatinny style scope rings and mounts. Designed specifically to fit the Winchester 70 WSM receiver this base measures 3.514 inches center spread and 6.670 inches overall length to match the factory hole pattern precisely. The base ships complete with hex head mounting screws and a wrench and Evolution Gun Works recommends torquing the screws to 20 inch pounds with a drop of blue Loctite for a secure installation. This level of fitment detail ensures the base seats correctly and stays put under recoil. Made in the USA the Evolution Gun Works Scope Base for Winchester 70 WSM is available for sale at GrabAGun for shooters upgrading their optic mounting system. Evolution Outdoors Scope Base Specifications Manufacturer: Evolution Outdoors Model: Scope Base Compatible Hosts: Winchester 70 WSM Material: 6061-T6 Extruded Aluminum Finish: Matte Black Style: Picatinny MOA: 0 MOA Center Spread: 3.514 Overall Length: 6.670 Mounting Hardware: Hex Head Screws and Wrench Available At: GrabAGun