Warne Savage Round Receiver Short Action Rail 20MOA - Black - Precision CNC machined from 7075/T6 aluminum for a high strength & lightweight platform; Mil-Spec hardcoat anodized finish for abrasion and corrosion resistance.; Bases feature black zinc coated hardware for "Element Proof" protection.; Self centering tapered T-15 Torx screws.; Fits Picatinny & Weaver style mounts and are NATO-STANAG compatible.;