The GAU-8/A Avenger is a 30mm rotary cannon primarily used on the A-10 Thunderbolt II aircraft. It is designed for close air support and can fire up to 3,900 rounds per minute, making it one of the most powerful aircraft cannons in service. The cannon is effective against armored vehicles and ground targets due to its high-velocity projectiles. The GAU-8/A features a unique seven-barrel design that allows for a high rate of fire while maintaining accuracy. It uses a combination of armor-piercing and high-explosive incendiary rounds, enhancing its effectiveness in combat situations. The cannon is an integral part of the A-10's capability to engage ground forces.