Mountain Tech Rail features CNC machined from 7075/T6 aluminum for a lightweight & rugged foundation. Mil-Spec Hardcoat anodize for durability and scratch resistance. Rails feature self centering black zinc coated hardware for precise alignment to your receiver and corrosion resistance. Mountain Tech Rails utilize the NATO Accessory Rail Interface standard ???STANAG???, and are Weaver style and Mil-Spec 1913 compatible. Fits Savage AXIS & Edge. Includes 20 MOA built in.