The Promag Standard Pro Smi27 Mag Shield 9mm 8rd Steel is a 8-round magazine chambered for 9mm. It features Steel construction. It is intended for S&W M&P Shield 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: 8 roundsMaterial: SteelFit: S&W M&P Shield