The Ruger SR40 Magazine is a standard factory replacement magazine. It is manufactured to the same specifications and tolerances using the same materials as the OEM Magazine that came with the pistol, guaranteeing optimal fit and reliable operation. Features and Specifications: Manufacturer Number: 90350 Ruger Factory Magazine Caliber .40 S&W Capacity: 15 Rounds Body Material: Steel Spring Material: Steel Follower Material: Polymer Baseplate Material: Polymer Finish: Black Fits: Ruger SR40 Pistol High capacity magazines are restricted in certain states: California, Colorado, Connecticut, District of Columbia, Illinois, Hawaii, Maryland, Massachusetts, New Jersey, New York , Vermont and Washington may be restricted in other municipalities. It is the customer’s responsibility to be aware of and abide by all applicable local laws. If you attempt to order over the rounds required for your area you will be contacted and the item will be reduced and removed from your order.