Mec-gar magazines are made in italy with the most sophisticated technologies and best materials.This mag features a high-impact polymer follower, heat treated carbon steel tube, and a high-impact polymer floor plate that sits flush with the pistol.Caliber: 9mm LugerCapacity: 17rdFinish: BluedModel: StandardMaterial: Carbon SteelType: DetachableModel Fit: Pro 2009Brand Fit: Sig SauerCapacity: 17Magazine 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.