000 rounds 556, also known as “556 ammo,” “556 1000 rounds,” “556 bulk ammo,” and “556 ammo for sale” is a Winchester USA 1000 rounds NATO ammunition is derived from (but more powerful than) the .223 Remington cartridge. This 1000 rounds 556 rifle ammunition is one of the most popular types used in AR-15 rifles and the full metal jacket round construction makes it affordable for high-volume range training. This cartridge also features reloadable brass making it an even better deal. For more information about 556 bulk ammo visit https://hmdefenses.com/product/winchester-usa-223-5-56-nato-ammunition-1000-rounds-fmj-55-grains/