Infantry Marines, MOS 0311, make up the largest portion of our Marine forces and are trained to be the first to fight and win. | Marine Corps Recruiting

At Infantry Training Battallion, "31s" train to strategically maneuver and fire heavy machine guns. In teams of two or three, machine gunners' effective fire tactics can overwhelm enemy fire in the field. Think you can make it in our ranks? Text THEFEW (843339). | Marine Corps Recruiting

GUNS UP Marine machine gunners are masters of their craft with a proud lineage that stretches back more than 100 years to the fielding of the first machine guns. Their fire has dominated the enemy from Belleau Wood to Guadalcanal, from An Hoa to Sangin. Today, they continue to train, honing their skills to stay ready and lethal on the modern battlefield. Have yourself a day, 0331s. 📷 (U.S. Marine Corps video by Staff Sgt. John A. Martinez) #USMC | U.S. Marine Corps