The Weaver Mounts 99476 Multi-Slot Base is an extended black anodized aluminum base that fits the Winchester XPR Long Action. This 1-piece base features a length of 10.3 inches and is designed to provide additional mounting options with 1 inch of forward length.Key FeaturesMount Type: Attaches directly to the receiver for secure installation.Material: Constructed from 6061-T6 aluminum for durability.Finish: Features a matte, Type III hard coat anodized finish for corrosion resistance.Compatibility: Compatible with both Picatinny and Weaver style rings.