The Weaver Mounts 99475 Multi-Slot Base is crafted from 6061-T6 aluminum and features a matte, Type III hard coat anodized finish. This one-piece base is designed to fit Mossberg Patriot short action rifles and provides an additional 1 inch of forward length for enhanced mounting flexibility.Key FeaturesMount Type: Attaches directly to the receiver for a secure fit.Style: Extended design allows for more mounting options.Compatibility: Works with both Picatinny and Weaver style rings.