Which of the following is a primary characteristic of the M249's suppressive fire capability?

The high rate of sustained fire is a primary characteristic of the M249's suppressive fire capability. This feature allows the M249 to deliver a continuous volume of fire, which is essential for suppression in a combat scenario. Suppressive fire is designed to keep the enemy's heads down, limit their movement, and provide cover for maneuvering troops. The ability to maintain a high volume of fire over extended periods makes the M249 particularly effective in fulfilling this role.

In addition to the high rate of fire, the M249's design is optimized for rapid firing, with features that facilitate quick ammunition changes and minimize overheating during sustained engagements. This characteristic enhances its reliability and effectiveness on the battlefield, allowing infantry units to maintain pressure on enemy positions. While considerations like accuracy, recoil management, and weight are important, they are secondary to the weapon's ability to deliver consistent suppressive fire.