More magazines means less time loading at the range.Introducing the highly durable the ProMag AR15 20 round magazine - Perfect as a spare or replacement.Designed for professional shooters and law enforcement personnel whose lives depend on a perfect shot every time the ProMag AR15/M16 20rd magazine is expertly machined for exceptional quality and guaranteed to feed and function for every shot.ProMag magazines include a lifetime guarantee if you ever have a problem with their magazines; simply return them to ProMag for replacement.When you need a cost effective aftermarket replacement mag that you know you can count on you need a ProMag!FeaturesManufacturer Number: COL-A9BProMag AR-15/M16 MagazineCaliber: .223 Remington 5.56 NATO 300 BlackoutCapacity: 20 RoundsBody Material: PolymerSpring Material: Chrome Silicon WireFollower Material: Dupont Zytel PolymerBaseplate Material: Dupont Zytel PolymerLifetime WarrantyMade in the U.S.A.Finish: BlackFitsColt AR-15 and similar firearms