This black oxide alloy steel, 10-round, 9mm Luger Genuine Ruger(R) Factory Magazine is compatible with the Security-9(R) pistol and the PC Carbine? with the SR9(R)/Security-9(R) 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(R) or SR9c(R) pistol. This Genuine Ruger(R) Factory Accessory is made in the USA.