The xprs detachable box magazine is constructed of a light yet rugged polymer and securely latches at both the front and rear for added security and to endure feeding reliability.The magazine is a slick and slim single stack design that feeds cartridges in a straight line right into the chamber.Nothing could be more straight-forward.Caliber: 350 LegendCapacity: 4rdModel: XPRMaterial: PolymerCapacity: 4rd