PPU PPRM5561 Rangemaster 5.56x45mm NATO 55 gr Full Metal Jacket Boat Tail. You must be 18 or older to purchase ammunition for use in a shotgun or rifle and 21 or older to purchase ammunition for use in a handgun. Ammunition cannot ship to a PO Box or APO/FPO addresses. Always make sure you use the correct ammunition for your firearm. Ammunition cannot be returned for any reason. Please consult applicable local laws before ordering.