US Cartridge, 37mm AP-T, M80
The M80 is very similar to the M74 Armor Piercing Shot which is fired from the M1A2 antiaircraft gun. The main differences are in the cartridge case and propelling charge. The two projectiles are of similar construction, but the M80 is lighter in weight. This is accomplished by shortening the projectile. The M80 is 4.23 inches long and weighs 1.66 pounds, while the M74 is 4.84 inches long and weighs 1.92 pounds.