At what range does the M249 achieve maximum effective grazing fire?

The M249 achieves maximum effective grazing fire at a range of 600 meters. Grazing fire is particularly effective because it allows the rounds to strike the ground near the enemy, creating a high probability of hitting targets without the risk of bullets ricocheting erratically. This is achieved because the bullet trajectory remains relatively low to the ground.

At 600 meters, the M249 can effectively suppress or engage targets, making it suitable for a variety of combat situations including providing covering fire for advancing troops. This range is strategically chosen to balance the weapon’s capabilities and the operational needs on the battlefield, ensuring maximum effectiveness in engaging enemy personnel. The M249's high rate of fire and accuracy contribute to its effectiveness at this range, establishing why it is the correct option for this question.