Product DescriptionThe Nordic Components MXT +5 Extension Tube Kit is designed to increase a 12 gauge shotgun's magazine capacity by five rounds when used with the required MXT extension tube nut (sold separately). Built from anodized 6061 aluminum for strength and corrosion resistance, this kit includes the extension tube, tube cap, and a full-length spring to help deliver reliable feeding for training, competition, and tactical applications.Product Highlights Adds +5 rounds of 12 gauge magazine capacity when installed with the correct Nordic MXT extension tube nut (not included). Anodized 6061 aluminum extension tube for durable, lightweight performance. Includes extension tube, tube cap, and full-length spring for a complete tube kit setup. Engineered for the Nordic Components MXT extension system. Black finish to match common shotgun and accessory colorways.Specs Brand: Nordic Components Manufacturer Part Number: MXT-TBS-12-5 UPC: 816696021492 Gauge: 12 Gauge Capacity Increase: +5 rounds Color: Black Material: 6061 Aluminum Finish: Anodized Tube Length: 11.6 in Includes: Extension Tube, Tube Cap, Full-Length Spring Compatibility Note: Requires a 12 gauge MXT extension tube nut for installation (sold separately).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.