What is the rate of fire for sustained firing using the M249?

The rate of fire for sustained firing using the M249 is 50 rounds per minute (rpm). This rate is designed for situations where the weapon is needed to provide controlled and accurate fire over an extended period without overheating. Sustained fire is typically used in a defensive posture or when a longer engagement is expected, where maintaining a consistent rate helps to manage the heat generated by the firearm and increases the weapon's reliability.

In contrast, higher rates of fire, such as 100 rpm or more, are generally associated with rapid or cyclic firing conditions, which can lead to overheating and potential malfunctions. Understanding the appropriate firing rates is crucial for effective weapon management in various combat scenarios.