Designed as a replacement or spare magazine the Ets Group Omega Ets Omg-sw9-mp-17 Omega M&p 17rd 9mm Mag provides 17-round capacity for 9mm. It features Polymer construction.It is a straightforward choice for replacing a worn magazine or keeping an additional magazine available for range training or field use.Caliber: 9mmCapacity: 17 roundsMaterial: Polymer