Wilson Combat Extension Tube Features The two-shot magazine extension mounts at the bottom of the receiver via a sling mount keeping the added length balanced and out of the way during handling which matters for hunters carrying a shotgun afield for extended periods. A wave washer is included to properly seat the extension against the factory magazine cap ensuring a secure rattle-free fit once installed. Because the follower on this extension is not grooved to fit newer 870 magazine tubes some owners may need to file down the tube s detent slightly for proper follower fitting a simple bench task most shotgun owners can handle with basic tools. The parkerized finish matches factory Remington finishes closely enough to blend in visually while adding its own layer of rust resistance. This extension tube is compatible across the Remington 870 1100 and 1187 platforms making it a versatile upgrade for anyone running any of these popular actions for hunting home defense or clay sports. The extra-power spring compensates for the added round count so that feeding reliability does not suffer as capacity increases which is critical for shooters who depend on their shotgun functioning flawlessly shot after shot. Because it is a drop-in style component with straightforward hardware most owners can complete the installation at home without gunsmith assistance. For Remington shotgun owners at GrabAGun looking to stretch their capacity without switching platforms this Wilson Combat extension tube is a proven affordable solution. Wilson Combat Extension Tube Specifications Brand: Wilson Combat Fits: Remington 870 1100 1187 Gauge: 12 Gauge Capacity Increase: 2 Rounds Finish: Parkerized Available At: GrabAGun