The .300 AAC Blackout, commonly known as 300 Blackout, is a rifle cartridge developed by Advanced Armament Corporation (AAC) in collaboration with Remington Defense. It was specifically designed to offer reliable performance in the AR-15 platform while providing increased versatility compared to the standard 5.56x45mm NATO round.
The key characteristic of the 300 Blackout is its ability to be fired through an AR-15 rifle chambered for 5.56x45mm NATO by simply changing the barrel. This makes it a popular choice for those who already own an AR-15 and want to utilize a different caliber without needing to purchase a new firearm.
The 300 Blackout cartridge is based on the .223 Remington or 5.56x45mm case, which is necked up to accept .308" diameter bullets. It was developed to address certain limitations of the 5.56mm round, particularly in short-barreled rifles and suppressed firearms.
The 300 Blackout offers several advantages. Firstly, it provides increased bullet mass and energy compared to the 5.56mm, making it more effective at shorter distances. It is often used for home defense, hunting, and tactical applications.
Secondly, the 300 Blackout can use both supersonic and subsonic ammunition. Subsonic rounds, when fired through a suppressed firearm, are much quieter than supersonic rounds, making them ideal for stealthy operations.
Lastly, the 300 Blackout has gained popularity due to its compatibility with a wide range of bullet weights and styles. It can be loaded with bullets ranging from 110 grains to 220 grains, providing versatility for various shooting applications.
Overall, the 300 Blackout offers shooters the ability to utilize a different caliber in their AR-15 platform, providing increased versatility, compatibility with suppressed firearms, and improved performance at shorter distances compared to the standard 5.56mm round.