The shield arms cz p10c/p07 magazine extension adds 5 rounds of 9mm and 4 rounds of 40 s&w to your cz p10c or p07 pistol.Shield arm's unique, easy access floor plate design allows you to easily access the spring and follower without having to remove the extension from the magazine body.Caliber: 9mm LugerCapacity: 5rdFinish: AnodizedModel: Magazine ExtensionMaterial: AluminumCapacity: 5