This black oxide alloy steel 10-round 9mm Luger Genuine Ruger® Factory Magazine is compatible with the Security-9® pistol and the PC Carbine? with the SR9®/Security-9® Magazine Well Insert installed. This magazine comes with a flush-fit floor plate installed and a finger extension in the package. It is not compatible with the SR9® or SR9c® pistol. This Genuine Ruger® Factory Accessory is made in the USA.