The GAU-8 Avenger is the 30 mm seven-barrel rotary cannon built around the Fairchild Republic A-10 Thunderbolt II, an American close air support aircraft that entered service in the late 1970s. Designed to fire armour-piercing rounds at an extremely high rate, its firing sound became famous in military footage and documentaries long before the internet. Online, clips of the cannon and its distinctive BRRRT noise spread through gaming, aviation and meme communities, where it became shorthand for sudden, unstoppable firepower and remains a popular edit sound today.