Hornady Frontier 5.56 NATO FMJ ammunition is American-made, military grade ammunition that is optimized for consistent and reliable performance in today's modern sporting rifles. Hornady partnered with the Lake City Army Ammunition Plant to produce Frontier ammo, a load combining brass casings with military-grade boxer primers and propellants. The full metal jacket's design ensures penetration without worry of jacket separation or bullet distortion. Affordable and dependable, shooters can rely on Hornady Frontier for proper feeding and ignition with every shot. "Ten bullets through one hole" is the philosophy that brought Hornady Manufacturing from a two-man operation in 1949, to a world-leading innovator of bullet, ammunition, reloading tool and accessory design and manufacture today. Hornady outperforms their competitors by ensuring the products they make are what the customers want right now, and then accurately predict and manufacture what they'll want and need in the future. Hornady Frontier Ammunition FR200 5.56 NATO 55 Grain Full Metal Jacket Projectile (M193 Specification) Brass Cased Boxer Primed Reloadable