Remington offers a wide variety of original factory barrels ranging in styles from vent rib, to cantilever to rifle sighted. Whether you want your Remington shotgun to perform like two, or you're restoring an old friend, there's no substitute for the superb craftsmanship and dependability of Remington replacement barrels. Model 870 Extra Barrels with 3" chambers will fit Super Magnum, Magnum and 2.75" receivers. These barrels will handle both 2.75" and 3" shells when used on Magnum receivers. Use only 2.75" shells when these barrels are used on 2.75" receivers.