The Springfield Armory XD OSP 4" Slide Full Assembly is an accessory designed specifically for the XD OSP model. It features a 4-inch barrel length and is finished in black. The assembly includes high fiber optic sights, providing enhanced visibility for accurate aiming.Key FeaturesBarrel Length: Fitted with a 4-inch barrel.Sights: Equipped with high fiber optic sights and a U-notch rear for improved target acquisition.