What should be checked first before firing the M777A2?

Before firing the M777A2, it is crucial to first ensure that all prefire checks are performed. This encompasses a systematic review of the howitzer's readiness and operational status, including verifying that all systems are functioning correctly, the gun is properly emplaced, and that it is aligned for firing. These checks help to identify any potential issues that could affect the weapon's performance or safety during operation.

Conducting prefire checks is a critical step that precedes other safety considerations, like personnel safety or ensuring the spades are dug in, because it directly addresses the howitzer's mechanical state and firing capabilities. If the prefire checklist isn't completed thoroughly, it could lead to misfires or other malfunctions that could compromise both the mission and the safety of the crew and surrounding personnel. Thus, ensuring all prefire checks are conducted is a foundational practice in the operation of the M777A2 howitzer.