ProMag Pistol Magazine Glock 48/43X 9mm Luger 50 Round Black 1 Pack DuPont Zytel Polymer 50RD. It is constructed of DuPont Zytel polymer with full length steel internal insert injection molded mag follower and mag spring formed from chrome silicone wire. Specifications for ProMag Glock 48/43X 9mm Luger 50 Round Pistol Magazine: Manufacturer: ProMag Gun Make: Glock Gun Model: Glock 48 Glock 43X Caliber: 9mm Luger Magazine Capacity: 50 Round Color: Black Fabric/Material: Polymer Package Contents: ProMag Glock 48/43X 9mm Luger 50 Round Pistol Magazine What firearm models does the manufacturer say ProMag Glock 48/43X 9mm Luger 50 Round Pistol Magazine is compatible with? The manufacturer says that ProMag Glock 48/43X 9mm Luger 50 Round Pistol Magazine is compatible with Glock 43X Glock 48ProMag DRMA20-50RD: Pistol Magazine Glock 48/43X 9mm Luger 50 Round Black 1 Pack DuPont Zytel Polymer