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.