Invest in deep penetration with Federal American Eagle Rifle Ammunition .223 55 GR FMJ 20 Box. Feed your rifle quickly. Give your rifle nothing short of perfect cycling with a noncorrosive finish and the top ammo you can find from a reliable ammo company. What has kept many loyalists buying this rifle ammunition besides the familiar feel and performance is the company's wide range of bullets with unique features designed for use in different conditions and for different shooters.