Shop › PROMAG FN FV SV 5.7X28MM 55RD DM FDE PROMAG FN FV SV 5.7X28MM 55RD DM FDE $129.99 ProMag Industries Magazine, Drum, 5.7X28MM, 55 Rounds, Fits FN Five-seveN USG 5.7x28mm pistol, Polymer Construction, Flat Dark Earth DRM-A76-FDE Quantity: Add To Cart Added! ProMag Industries Magazine, Drum, 5.7X28MM, 55 Rounds, Fits FN Five-seveN USG 5.7x28mm pistol, Polymer Construction, Flat Dark Earth DRM-A76-FDE