Pro Mag Ruger P90 / P97 .45 ACP Pistol Magazine Steel Blue 15 Round 15RD. It is constructed of heat treated steel with injection molded mag follower and mag spring formed from chrome silicone wire. Specifications for ProMag Ruger SR .40 S&W 15 Round Pistol Magazine: Manufacturer: ProMag Gun Make: Ruger Magazine Capacity: 15 Round Fabric/Material: Steel Package Contents: ProMag Ruger SR .40 S&W 15 Round Pistol Magazine What firearm models does the manufacturer say ProMag Ruger SR .40 S&W 15 Round Pistol Magazine is compatible with? The manufacturer says that ProMag Ruger SR .40 S&W 15 Round Pistol Magazine is compatible with Ruger SR9 Ruger SR40 Ruger P90Pro Mag RUG-A2-15RD: Ruger P90 / P97 .45 ACP Pistol Magazine Steel Blue 15 Round