Bulk 5.56x45 Ammo 5.56x45 NAT...n 5.56x45 rounds derived c...ired rate of fire in a...ition) of.223 Remingto...ction of .223rounds for pu...for most of the regional rounds and ammunitio...ditional] 1000 Spheres of 5.56x45 Ammo through P...y to Ship 1000 Arounds o...f 5.56x45 Ammo through P...o through Winchester - 6...