The Kriss USA KVAMX2K45BL00 Mag-Ex2 Extension Kit is an exceptional accessory that significantly enhances the capacity of your Glock 21 Gen3-5 magazines, transforming the standard 13-round magazine into an impressive 30-round powerhouse. Designed with precision and reliability, this extension kit is constructed from durable black polymer, ensuring a seamless integration with your existing Glock 21 magazine for a secure fit and consistent performance. Perfectly suited for use with the Kriss Vector, the Mag-Ex2 Extension Kit caters to firearm enthusiasts who demand more from their 45 ACP firearms. It not only boosts your magazine's capacity but also preserves the sleek, ergonomic design that Kriss is known for, allowing for comfortable handling during use. The user-friendly installation process means you can quickly upgrade your magazine without needing specialized tools or expertise, making it ideal for both range practice and competitive shooting environments. With the Kriss USA Mag-Ex2 Extension Kit, you can experience a remarkable blend of innovation and functionality, elevating your shooting capabilities and ensuring you stay ahead in any shooting scenario.