Product Description The Wilson Combat One Shot Tactical magazine extension tube is a rugged, parkerized steel upgrade designed to add one additional round to compatible 12 gauge Remington shotguns while providing a convenient front-mounted quick-detach (QD) sling stud. Built for hard use, this extension ships ready to install with an extra-power magazine spring and a neon green high-visibility follower to promote reliable feeding and provide a clear visual indication of an empty magazine tube. A wave washer is included for proper fitment. Note: the included follower is not grooved to fit some newer Remington 870 magazine tubes; the magazine-tube detent may require minor fitting. Product Highlights +1 capacity magazine extension tube for compatible Remington 12 gauge platforms Front-mounted quick-detach (QD) sling stud for fast sling attachment Includes extra-power magazine spring to help improve feeding reliability Neon green high-visibility follower aids feeding and shows an empty tube at a glance Durable black parkerized finish; wave washer included for installation support Specs Brand: Wilson Combat Type: Shotgun magazine extension tube Gauge: 12 Gauge Compatibility: Remington 870 / 1100 / 11-87 (12 Gauge) Capacity Increase: +1 round (commonly resulting in 5-round total capacity on compatible setups) Finish/Color: Black Parkerized Special Feature: QD sling stud (front of tube) Included Components: Extension tube, extra-power magazine spring, high-visibility follower, wave washer Overall Length: 2.37 in Weight: 0.4 lb UPC: 874218003388 Manufacturer Part Number: SGETQDSU1 Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer.