The Promag Standard Pro Smi23 Mag Sw M&p 9mm 10rd Steel is a 10-round magazine chambered for 9mm. It features Steel construction. It is intended for S&W M&P compatibility.It is a straightforward choice for replacing a worn magazine or keeping an additional magazine available for range training or field use.Caliber: 9mmCapacity: 10 roundsMaterial: SteelFit: S&W M&P