This product is a box of 30 rounds of 5.56x45mm NATO 55gr M193 FMJ brass case ammunition with sealed primers.
NOTE: This ammunition has been tested for ballistics pressure, and is safe to fire through modern .223 Remington rifles. The maximum average pressure through the 5.56 test barrel was lower than the 55,000 PSI maximum average pressure standardized by SAAMI for the .223 Remington cartridge.