Carlson's Choke Tubes's Shotgun Magazine Extensions offer a reliable solution for enhancing the capacity of your favorite shotgun. Crafted from durable blued solid steel, these extensions are designed for strength and longevity. Each kit includes everything you need for a seamless installation: a high-quality spring, base clamp and a high-visibility follower. By simply replacing your magazine tube cap and spring, you can effortlessly increase your shotgun's ammunition capacity, making it an ideal choice for home protection, self-defense and competition shooting. Upgrade your shotgun with Carlson's Choke Tubes's and experience enhanced performance and peace of mind.