The Carlson Magazine Extension for Nova/SN/Ber Extrema/1301/CZ 712/912 is designed to enhance your shotgun's firepower, making it an essential accessory for enthusiasts and professionals alike. Constructed from durable blued solid steel, this magazine extension not only ensures longevity but also seamlessly integrates with your shotgun by replacing the magazine cap. With a capacity of 10 rounds, it provides the extra ammunition needed for home protection, competition shooting, or law enforcement applications. The included spring and base clamp with swivel stud facilitate easy attachment to a quick detachable swivel, enhancing versatility during use. Additionally, the high visibility follower ensures reliable feeding, although some extensions may require the factory follower for optimal performance. Whether you're looking to improve your shotgun's functionality or simply want to increase your round count for various shooting scenarios, this magazine extension is a practical solution that combines quality construction with user-friendly features.