Marine Corps

0331:Machine Gunner (MOS 0331)

As the title implies, Marine machine gunners are specialists in all mounted machine guns in the Marine Corps arsenal. They are experts on the maintenance, maneuvering, mounting, and utilization of Marine Corps heavy machine guns.


Is there a clearance required?: No

Is this a combat or support MOS?: Combat


Military Duties:

Machine gunners will spend a large portion of their Marine Corps career at the armory. Clean and well-maintained weapons are extremely important, so it is not uncommon for 0331 marines to spend several hours per day at the armory where they will be cleaning and maintaining their weapons. In addition to armory time, machine gunners will also spend a significant amount of time in the field. Training is best when it is most realistic, so infantry battalions will find ways to make sure that all 0331’s are most prepared for war. This is done by sending infantry platoons into the field for days or weeks at a time where they will practice “humping” (hiking), deploying weapon systems, and trenching in to fighting positions.

Military Duties Translated:

Respond immediately to citizen calls for assistance and to alarms triggered at homes and businesses Maintain a presence in the community that helps to deter crime and provide support to citizens Help to secure crime scenes and ensure that evidence is not removed or tampered with Act as a police presence at public events and provide security for municipal gatherings Identify potential criminal activity or other hazardous situations and take the proper actions to protect citizens and property

Some civilian jobs best suited to this type of military experience:

Law Enforcement