20rds - 5.56 NATO Hornady Superformance 55gr. GMX Ammo

This is 5.56 NATO Hornady Superformance 55gr. GMX Ammo. Superformance ammunition achieves 100 to 200 fps over SAAMI standard in all calibers, all bullet weights and all bullet types. This performance is achieved by revolutionary new, extremely efficient powders optimized for each load. Brass cased, boxer primed, non-corrosive primers. Muzzle velocity of 3190fps. This ammo comes packed in 20rd. boxes.