ProMag Rifle Magazine AR-15 9mm Luger Glock Style 50 Round Black 1 Pack DuPont Zytel Polymer 50RD. It is constructed of DuPont Zytel polymer with injection molded mag follower and mag spring formed from chrome silicone wire. Specifications for ProMag AR-15 9mm Luger Glock Style Mag 50 Round Rifle Magazine: Manufacturer: ProMag Color: Black Fabric/Material: Polymer Magazine Capacity: 50 Round Caliber: 9mm Luger Gun Make: AR Platform Gun Model: AR-15 Package Contents: ProMag AR-15 9mm Luger Glock Style Mag 50 Round Rifle Magazine What firearm models does the manufacturer say ProMag AR-15 9mm Luger Glock Style Mag 50 Round Rifle Magazine is compatible with? The manufacturer says that ProMag AR-15 9mm Luger Glock Style Mag 50 Round Rifle Magazine is compatible with AR-15ProMag DRMA12-50RD: Rifle Magazine AR-15 9mm Luger Glock Style 50 Round Black 1 Pack DuPont Zytel Polymer