What is the configuration of the M240 machine gun?

The M240 machine gun is accurately described as belt-fed and gas-operated. This configuration allows for sustained fire, making it suitable for various combat scenarios. Being belt-fed means that ammunition is linked together in a belt, which allows for a higher volume of fire compared to magazine-fed systems, which rely on individual cartridges. This design is particularly beneficial in military operations, where continuous fire might be necessary to suppress enemy positions or support ground troops.

The gas-operated mechanism utilizes the gas created from firing a round to cycle the action, eject the spent cartridge, and chamber the next round. This method is efficient and reliable, which is essential for a machine gun expected to function effectively in demanding conditions.

In contrast, options that describe the M240 as magazine-fed or employing differing operating mechanisms do not accurately represent its design and function. The precision of the M240's configuration enhances its effectiveness as a support weapon in the USMC arsenal.