Shield Arms(R) Z9 Magazine Extension is designed for compatible Z9 magazines used with the Glock 43 pistol. The extension adds 3 rounds of magazine capacity and features durable aluminum construction with a black finish. It provides an extended base configuration while maintaining compatibility with the Z9 magazine system.Key Features Designed for Shield Arms Z9 magazines Designed for the Glock 43 platform Adds 3 rounds of magazine capacity Designed for 9mm applications Aluminum construction Extended magazine base design Black finishShield Arms(R) manufactures magazines firearm components and accessories for a variety of handgun platforms. The company develops purpose-built products with an emphasis on functional compatibility durable materials and dependable operation. Shield Arms products are manufactured with attention to fit performance and practical firearm applications.