Shop › MAG FN FIVE-SEVEN 5.7X28MM 20RD BLK MAG FN FIVE-SEVEN 5.7X28MM 20RD BLK $44.99 FN America Magazine, 5.7x28mm, 20 Rounds, Fits FiveseveN, Polymer, Black 3866100030 Quantity: Add To Cart Added! FN America Magazine, 5.7x28mm, 20 Rounds, Fits FiveseveN, Polymer, Black 3866100030