ProMag Polymer Rifle Magazine FN Scar 17 .308 50-Round Dark Earth 50RD. The follower is injection molded and the magazine spring formed from heat treated chrome silicon wire. Specifications for ProMag Polymer FN Scar 17 .308 50-Round Rifle Magazine: Manufacturer: ProMag Fabric/Material: Polymer Magazine Capacity: 50 Round Caliber: .308 Winchester Gun Make: FN Herstal Gun Model: FN SCAR 17 Condition: New Package Contents: ProMag Polymer FN Scar 17 .308 50-Round Rifle Magazine What firearm models does the manufacturer say ProMag Polymer FN Scar 17 .308 50-Round Rifle Magazine is compatible with? The manufacturer says that ProMag Polymer FN Scar 17 .308 50-Round Rifle Magazine is compatible with FN SCAR 17ProMag DRM-A41-FDE-50RD: Polymer Rifle Magazine FN Scar 17 .308 50-Round Dark Earth