The 5.56 55 Grain FMJ Shell Shock Technologies Cased Ammunition from AAC delivers superior performance when you need it most. The projectile is developed with & is manufactured by Hornady. Designed for use in a variety of applications and manufactured through AAC's advanced research, design, and engineering process with state-of-the-art, quality machines, and materials. Rigorously refined by AAC through multiple quality control checkpoints from conception to production. AAC Components make projectiles for the shooter who values attention to detail, quality, and advanced reliability. Shell Shock Technologies Two-Piece Case: Engineered for the future:50% lighter than brass. Stronger than brass Outperforms nickel-plated brass on every level Uniform wall thickness plus proprietary assembly techniques equals reliable and consistent velocity Ejects cool to the touch Made in the USA Accurate and reliable. 250 Rounds of AAC 5.56 NATO 55 Grain FMJ Shell Shock Technologies Ammo in an AAC Blue 30 Cal Ammo Can.American Made in beautiful Columbia, SC.