ProMag Polymer Pistol Magazine Ruger LC9 9mm 30-Round Black 30RD. The follower is injection molded and the magazine spring formed from heat treated chrome silicon wire. Specifications for ProMag Polymer Ruger LC9 9mm 30-Round Pistol Magazine: Manufacturer: ProMag Gun Model: Ruger LC9 Caliber: 9mm Luger Magazine Capacity: 30 Round Package Contents: ProMag Polymer Ruger LC9 9mm 30-Round Pistol Magazine What firearm models does the manufacturer say ProMag Polymer Ruger LC9 9mm 30-Round Pistol Magazine is compatible with? The manufacturer says that ProMag Polymer Ruger LC9 9mm 30-Round Pistol Magazine is compatible with Ruger LC9ProMag DRM-A95-30RD: Polymer Pistol Magazine Ruger LC9 9mm 30-Round Black