What defines a "hot barrel" for the M60E3 machine gun?

A "hot barrel" for the M60E3 machine gun is defined as a condition resulting from sustained firing, typically identified when more than 150 rounds have been fired in one minute. This threshold indicates that the barrel has reached a temperature that may impact its performance and safety.

When the barrel is hot, it can lead to various issues, such as reduced accuracy, potential cook-offs (where a round discharges unintentionally due to the heat), and accelerated wear on the barrel itself. Therefore, understanding this definition is crucial for maintaining the effectiveness of the weapon system and ensuring the safety of its operation. Proper management of firing rates and monitoring barrel temperature helps prevent complications that could arise from overheating during sustained engagement scenarios.