Vortex premium rails are Canadian made for shooters and by shooters, and feature the highest quality American 7075 T651 Aluminum.  After the machining process, they are Type 3 hard coat anodized, which makes them extremely durable.  These rails employ 100% contact with the action, which precludes the need for bedding the rail in order to get full contact.  1913 Picatinny specifications are followed to an extremely tight tolerance (+/- .002 “).  All these features together ensure a rock solid and durable base for any optical system.