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 Add To Cart Added! Frontier Cartridge Lake City, 556 NATO, 62 Grain, Full Metal Jacket, 20 Round Box FR260