Product DescriptionThe Nordic Components MXT +8 Extension Tube Kit is designed to increase your 12 gauge shotgun magazine capacity by eight rounds when used in conjunction with a compatible 12 gauge extension tube nut (nut required). Built from anodized 6061 aluminum for strength and corrosion resistance, this kit includes the key components needed to complete an MXT-style magazine extension setup, including the extension tube, tube cap, and a full-length spring.Product Highlights Adds +8 rounds of capacity to compatible 12 gauge shotgun magazine systems (with required extension tube nut). Includes essential components: extension tube, tube cap, and full-length spring. Made from anodized 6061 aluminum for durable, lightweight performance. Black finish to match common tactical and sporting shotgun builds. Designed to integrate with the Nordic Components MXT extension system (shotgun-specific nut required).Specs Brand: Nordic Components Product Type: Magazine extension tube kit Gauge: 12 Gauge Capacity Increase: +8 rounds Color/Finish: Black (anodized) Material: 6061 Aluminum (anodized) Included: Extension Tube, Tube Cap, Full-Length Spring Tube Length: 19.09 in Manufacturer Part Number: MXT-TBS-12-8K UPC: 816696021522 Compatibility Note: Used with a 12 gauge extension tube nut (required; 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.