300 Blackout

The .300 AAC Blackout (7.62×35mm), is an intermediate cartridge developed in the United States by Advanced Armament Corp. (AAC) for use in the AR 15 Platform. The cartridge yields increased performance in shorter barrels and effective subsonic performance for silencer use when compared to 5.56 NATO. The 300 AAC Blackout uses standard 5.56mm NATO magazines and components with the exception of the barrel.