ProMag Extended Pistol Magazine Ruger SR9 9mm Luger 32 Round Blued 1 Pack Steel 32RD. It is constructed of heated treated steel with injection molded mag follower and mag spring formed from chrome silicone wire. Specifications for ProMag Ruger SR9 9mm Luger 32 Round Extended Pistol Magazine: Manufacturer: ProMag Gun Make: Ruger Gun Model: Ruger SR9 Caliber: 9mm Luger Magazine Capacity: 32 Round Color: Blued Fabric/Material: Stainless Steel Features of ProMag Steel Ruger SR9 9mm 32-Round Pistol Magazine Magazine body constructed of heat treated steel with black oxide finish Injection molded magazine follower Magazine spring formed from heat treated chrome silicone wire Package Contents: ProMag Ruger SR9 9mm Luger 32 Round Extended Pistol Magazine What firearm models does the manufacturer say ProMag Ruger SR9 9mm Luger 32 Round Extended Pistol Magazine is compatible with? The manufacturer suggests that ProMag Ruger SR9 9mm Luger 32 Round Extended Pistol Magazine is compatible with Ruger SR9ProMag RUGA34-32RD: Extended Pistol Magazine Ruger SR9 9mm Luger 32 Round Blued 1 Pack Steel