The Warne Scope Mounts S&W M&P 9/40 magazine extension is a premium upgrade designed to enhance your firearm's performance and capacity. Specifically engineered to fit the S&W M&P 9/40, this blue magazine extension offers a significant capacity increase, adding +3 rounds for 9mm and +2 rounds for .40 caliber, making it an essential accessory for those seeking to maximize their magazine's potential. With its robust construction and seamless integration, the Warne M&P mag extension ensures reliable feeding and improved handling, making it an ideal choice for both competitive shooting and personal defense scenarios. The S&W M&P 9/40 magazine upgrade not only boosts your firearm's capacity but also enhances its overall functionality, providing a tactical advantage in various shooting environments. The Warne handgun magazine extension is crafted with precision and durability in mind, ensuring it withstands rigorous use while maintaining optimal performance. Its sleek blue finish complements the aesthetics of your S&W M&P 9/40, adding a touch of style to its formidable functionality. Whether you're a professional shooter or a firearm enthusiast, the Warne mag extension is a valuable addition to your gear, offering increased capacity and reliability when you need it most. With a UPC of 656813108091 and MPN 3307, this magazine extension is a must-have for those looking to enhance their S&W M&P 9/40 with a trusted and high-quality upgrade.