Which of the following is a primary feature of the M249 machine gun?

The primary feature of the M249 machine gun is its lightweight design. This characteristic is crucial for infantry operations, as it allows soldiers to carry the weapon over long distances without excessive fatigue. The M249's portability enhances maneuverability on the battlefield, making it easier for troops to reposition quickly while maintaining their suppressive fire capabilities.

The lightweight design is further complemented by the gun's overall user-friendly handling, which is essential for maintaining operational effectiveness in diverse combat scenarios. This focus on weight optimization supports combined arms operations where mobility and the ability to engage targets effectively are paramount.

Ultimately, the M249's design philosophy places significant emphasis on balancing firepower with the need for mobility, making its lightweight design a standout feature in comparison to other machine guns that may prioritize fire rate or caliber.