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: 5Magazine Restrictions: The following states have magazine restrictions. Your order will not ship to those states if in violation of these laws and will be subject to cancellation and a 15% restocking fee. California - Limited to 10-round capacity. Connecticut - Limited to 10-round capacity. Colorado - Limited to a 15-round capacity. Delaware - Limited to 17-round capacity. Hawaii - Handguns limited to 10-round capacity Illinois (Cook Co, Aurora, Highland Park) - Pistol mags are limited to 10 rounds. Massachusetts - Limited to 10-round capacity. Maryland - Limited to 10-round capacity. New Jersey - Limited to 10-round capacity. New York - Limited to 10-round capacity. Road Island - Limited to 10-round capacity. Vermont - Handguns limited to 15-round capacity, Rifles limited to 10-round capacity. Washington DC - Limited to 10-round capacity. Washington - Limited to 10-round capacity.