What type of ammunition does the M119A3 use?

The M119A3 artillery system uses 105mm projectile rounds, which include various types such as high explosive (HE), smoke, and illumination. This capability is essential for the effective support of ground troops, allowing them to engage a range of targets under different operational conditions. The versatility of 105mm rounds contributes to the system's effectiveness in various combat scenarios, enabling it to deliver lethal firepower, create screen smoke for concealment, or provide illumination for enhanced visibility during nighttime operations.

Other types of ammunition mentioned in the answer choices do not correspond to the M119A3's specifications. For instance, 82mm mortar rounds are used in different mortar systems, and 140mm guided missile rounds are not applicable to the M119A3, which is not designed to fire guided munitions of that caliber. Additionally, standard 150mm shells pertain to larger artillery systems and are not used in the M119A3, which focuses on the smaller 105mm caliber for its operational effectiveness.