The Shield Arms magazine extension increases the capacity of your Z9 magazine by three rounds. Its distinctive floor plate design facilitates swift access to the spring and follower without necessitating the removal of the extension from the magazine body. This product is backed by a comprehensive lifetime warranty and is covered by the Shield Arms spring for Life guarantee. The floorplate features a unique design that allows for servicing or cleaning the magazine body without detaching the magazine extension The extension body features index cuts designed to enhance grip, facilitating easier retrieval from a magazine pouch The component is precisely crafted from billet 6061 aluminum, ensuring high strength and durability, while offering excellent corrosion resistance and machinability The Type II anodized finish is an electrochemical process that enhances aluminum's corrosion resistance and durability, providing a protective oxide layer Shield Arms Z9 PowerCron magazine by adding 3-round, resulting in a total capacity of 12-round, doubling the standard OEM capacity Equipped with a 14-coil configuration and an enhanced power spring, this device ensures optimal performance and efficiency Magazine extension with lifetime warranty - enjoy peace of mind with our durable magazine extension, backed by a comprehensive lifetime warranty for ultimate reliability