FN America FN Five-seveN MRD Pistol Magazine 5.7x28mm 20 Round Black 1 Pack Polymer 20RD. Specifications for FN America FN Five-seveN MRD 5.7x28mm 20 Round Pistol Magazine: Manufacturer: FN America Gun Make: FN Herstal Gun Model: FN Five-seveN Caliber: 5.7x28mm Magazine Capacity: 20 Round Color: Black Fabric/Material: Polymer Package Contents: FN America FN Five-seveN MRD 5.7x28mm 20 Round Pistol Magazine What firearm models does the manufacturer say FN America FN Five-seveN MRD 5.7x28mm 20 Round Pistol Magazine is compatible with? The manufacturer says that FN America FN Five-seveN MRD 5.7x28mm 20 Round Pistol Magazine is compatible with FN Five-seveNFN America 20100682-20RD: FN Five-seveN MRD Pistol Magazine 5.7x28mm 20 Round Black 1 Pack Polymer