text: Armor-piercing, M1922 (1922–1934): This was a redesigned armor-piercing round with a heavier steel core. It was the first armor-piercing round to have a black-painted bullet tip.
  Armor-piercing, M1 (1934–1939): This was a higher-velocity (3,180 fps) AP round that was under development throughout its service. It was replaced in 1939 by the AP M2, a redesign of the AP M1922.
  Armor piercing, M2 (1939–1954): This cartridge is used against lightly armored vehicles, protective shelters, and personnel, and can be identified by its black bullet tip. Bullet is flat base, weight 163–168 grains. Defense against the M2 projectile by name is one of the performance standards for Type IV body armor.
  Armor-piercing incendiary, T15/M14 (1943–?) and M14A1 (?-1954): This cartridge may be substituted for the M2 armor-piercing round and is normally employed against flammable targets. The tip of the M14 bullet is colored with a blue tip over a black ring. The M14A1 featured an improved core design and incendiary charge and had a silver-colored aluminum-painted tip.
  Ball, M1906 (1906–1925): This cartridge is used against personnel and unarmored targets and can be identified by its silver-colored cupro-nickel alloy bullet jacket. The M1906 has a  projectile and flat base. Its jacket was found to quickly foul the bore.