What type of ammunition is NOT included for the M240L/M240B?

The M240L and M240B machine guns are primarily designed to utilize standard military ammunition types that are effective for combat scenarios, such as ball and tracer rounds. Ball ammunition provides the standard projectile for engaging targets, while tracer rounds are beneficial for tracking fire and adjusting aim.

Riot ammunition, however, is specifically designed for law enforcement use, typically aimed at controlling crowds or lesser lethal engagements. It may include bean bag rounds or other non-lethal projectiles, which are not suitable for the combat-focused capabilities of the M240 machine guns. Consequently, riot ammunition does not align with the intended operational use of the M240L and M240B, making it the correct answer as it is not included among the types of ammunition designed for these weapons systems.