The Promag AR15 Rollermag .223 Remington 10 Round Magazine (FDE) is a 10-round magazine chambered for 5.56x45mm NATO. It features DuPont Zytel Polymer construction. It is intended for AR-15 platform compatibility.It is a straightforward choice for replacing a worn magazine or keeping an additional magazine available for range training or field use.Caliber: 5.56x45mm NATOCapacity: 10 roundsMaterial: DuPont Zytel PolymerFit: AR-15 platform