Enhance the effectiveness of your favorite shotgun with these premium magazine extensions. Crafted from rugged blued solid steel, these extensions come complete with a spring, a base clamp featuring a swivel stud (included, designed for compatibility with quick detachable swivels, not included), and a high-visibility follower (please note that certain extensions may require a factory follower, which is not provided). The threaded tube seamlessly replaces your magazine cap, allowing you to add extra rounds to your magazine. Installing the extension is a breeze, thanks to the user-friendly instructions included. This magazine extension tube is a versatile addition that proves highly advantageous for home protection, competition shooting, and law enforcement applications.