5.56x45mm NATO

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5.56X45MM NATO Ammunition

Check out Sportsman's Guide's huge selection of .223 Ammo that is in-stock and ready to ship at the best prices around! Our high quality 5.56 NATO Rifle Ammunition is the most popular centerfire cartridge in America.  Use this Ballistics Charts to determine the firing specifics of your ammo. Sportsman's Guide has a wide selection of 5.56X45MM NATO ammunition options for your hunting needs.