Federal A.E 5.56/.223 55Gr Fmj Ammunition moves with impressive speed at a muzzle velocity of 3,165 feet per second. The Full Metal Jacket Boat Tail rounds don’t expand on impact and give increased resistance to cross-winds. These lightweight Federal A.E 5.56/.223 55Gr Fmj rounds move to your target with extreme speed but are still capable of putting an impressive hole in your stationary targets. This high quality ammo is for your NATO-chambered rifle.