The GrovTec GTSW296 Mag Cap is designed to replace the factory cap on the Remington 870 Express 12 Gauge shotgun. This 1-inch push button model features a black oxide finish and is constructed from steel, ensuring durability in various conditions.Key FeaturesIncluded Components: Set includes a 12 gauge mag cap and a standard 1-inch GT Push Button Swivel for enhanced functionality.Compatibility: Specifically designed for use with Remington 870 Express 12 Gauge shotguns.Versatility: Allows for the use of GT Push Button swivels, GT Twist Lock swivels, or the GT Multi-Adaptor, providing options for different field needs.