The M80 is a type of military ammunition, specifically a 7.62x51mm NATO cartridge. It is designed for use in various firearms, including rifles and machine guns. The M80 round is known for its effectiveness in combat situations, providing reliable performance and accuracy. This cartridge features a full metal jacket bullet, which helps reduce barrel wear and improves penetration. The M80 is commonly used by armed forces around the world, including those of the United States and NATO member countries, making it a standard choice for military operations.