Looking to add a magazine extension or light mount to your shotgun? This magazine tube mount fits Remington 870 and Mossberg 500 12 gauge models perfectly. Model: MT12G. It's new and unused, though it ships in a generic ziplock bag (not retail packaging). Screws onto your magazine tube to provide a stable mounting point for accessories. Great for DIY shotgun builds, tactical upgrades, or just adding capacity. Unbranded but made to specification. Whether you're a hunter, sport shooter, or home defense prepper, having a solid mount makes customization easier. Easy to install with basic tools. No modifications needed – just attach and go. UPC does not apply. Note: This is just the mount, not the extension tube itself. Make your shotgun more versatile with this simple, affordable piece of hardware.