The duramag ss is designed for serious shooters who require the most out of their magazines so when performance and durability are paramount.It is constructed from premium 410 stainless steel for maximum durability.This material, coupled with advanced interior and exterior geometries, ensure ultimate reliability and feeding.This magazine utilizes duramag t-360 coating to ensure not only incredibly smooth performance and ease of loading, but also product longevity through the harshest conditions.Caliber: 223 RemCapacity: 10rdModel: DURAMAG SSMaterial: Stainless SteelModel Fit: AR-15Capacity: 10Magazine 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.