The best way to carry six extra rounds in the most convenient and accessible location for quick reloading without losing sight. Mounts directly to the shotgun receiver with an aircraft-grade aluminum mounting plate. Shell holder is injection-molded of Hytrel®, a durable polymer that resists damage from wear, moisture and temperature extremes. Easy installation. In most cases, no alterations are required. For Remington 870 Express and Wingmaster, a minor modification to the shotgun forend is required. Available: Winchester 1200/1300 Remington 870/1100-12 gauge Remington 870/20-gauge Mossberg 500/600 Benelli M1-90 Misc Shooting Accessories