Product DescriptionIncrease your shotgun's on-board capacity with the Carlson's Magazine Extension designed for select Remington 12 gauge platforms. Built from solid blued steel, this extension replaces your factory magazine cap and adds additional shell capacity for home protection, competition shooting, and duty use. The kit includes the extension tube, spring, and a barrel clamp with sling swivel stud (quick-detach swivel not included). A high-visibility follower may be included depending on application (some extensions require using the factory follower).Product Highlights Solid blued steel magazine extension tube for durable, recoil-ready performance 10-shot magazine extension system for 12 gauge Remington shotgun platforms Includes spring and barrel clamp; clamp features an integrated swivel stud Threaded tube replaces the factory magazine cap for straightforward installation Great for home defense, competition shooting, and law enforcement applicationsSpecs Brand: Carlsons Manufacturer Part Number: 04504 UPC: 723189045043 Gauge: 12 Gauge Capacity: 10-shot total capacity with 2-3/4" shells Material: Steel Finish/Color: Blued Overall Length: 14.25" (approx.) Compatible Models: Remington 870, 1100, 11-87, Versa Max, V3 Included: Extension tube, spring, base/barrel clamp with swivel stud; high-visibility follower may be included depending on application Country of Origin: USADisclaimer: 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.