The M240B machine guns use several types of standard 7.62-mm ammunition. Figure 3-3 shows the types and their characteristics. Soldiers may only use authorized ammunition manufactured to US and NATO specifications. Ammunition for the M240B is issued in a disintegrating, metallic, split-linked belt (Figure 3-4).
The M240B machine gun uses the following types of ammunition. See also table 3-3:
• Cartridge, 7.62-mm Ball M80—for use against light materials and personnel, and for range training.
• Cartridge, 7.62-mm Armor-Piercing M61—for use against lightly armored targets.
• Cartridge, 7.62-mm Tracer M62—for observation of fire, incendiary effects, signaling, and for training. "When the gunner fires tracer rounds, they mix with ball ammunition in a ratio of four ball rounds to one tracer round."
• Cartridge, 7.62-mm Dummy M63—for use during mechanical training.
• Cartridge, 7.62-mm Blank M82—for use during training when simulated live fire is desired. The gunner should use a blank firing adaptor (BFA) to fire this ammunition.