Product Features Vapor Picatinny rail designed for Winchester XPR Short Action rifles Fits receivers with 8-40 screws Zero MOA rail design Precision CNC machined from 6061/T6 aluminum Mil-Spec hardcoat anodized finish for abrasion and corrosion resistance Self-centering tapered T-15 Torx screws Compatible with Picatinny and Weaver style rings NATO-STANAG compatible Designed and made in the USA Product Specifications Brand: Warne Vapor Model: V488M Winchester XPR SA Vapor Picatinny Rail Part Number: V488M Fit: Winchester XPR Short Action MOA: Zero MOA Material: Aluminum Weight: 1.8 oz. Screw Type: Tapered 8-40 screws