What does the designation APIT in M2 ammunition stand for?

The designation APIT in M2 ammunition stands for Armor-Piercing Incendiary Tracer. This classification indicates that the projectile is designed to penetrate armor while also possessing incendiary properties, meaning it can ignite combustible materials upon impact. The addition of "Tracer" signifies that the round leaves a visible trace of light, allowing the shooter to see the trajectory of the round and make necessary adjustments in real-time during firing. This combination of features—armor-piercing capability, incendiary effects, and tracer visibility—makes APIT rounds particularly effective in engaging armored targets as well as providing tactical advantages in live-fire scenarios. The understanding of these characteristics is crucial for effective ammunition selection and employment in various combat situations.