Shop › FRONTIER 556NATO 62GR FMJ 20/500 FRONTIER 556NATO 62GR FMJ 20/500 $17.95 Frontier Cartridge Lake City, 556 NATO, 62 Grain, Full Metal Jacket, 20 Round Box FR260 Quantity: Add To Cart Added! Frontier Cartridge Lake City, 556 NATO, 62 Grain, Full Metal Jacket, 20 Round Box FR260