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Infantry MOS

Gone are the days of the stereotypical big dumb lumbering brutes of old. Today’s Space Marines are lean, mean, and well educated. They have to be. In fact the minimum ASVAB score for Space Marine infantry is twice that of the US Army. The rigor of modern off-world combat requires Marines to be proficient not only in standard infantry weapons and tactics but be proficient in Zero-G combat and EVA operations.

 

Combat Arms : Infantry

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USMSC Infantry in exercise on Walker's World

Training

This is not your grand-pappy's Marine Infantry. Marines of today are lean, mean, and well educated. They have to be. In fact the minimum Armed Services Vocational Aptitude Battery (ASVAB) score for Space Marine infantry is twice that of the US Army minimum requirements. The rigor of modern space combat requires Marines to be proficient in not only standard infantry weapons and tactics but be proficient in Zero-G combat and EVA operations as well.

Upon completion of boot camp, Marines slated to infantry report to one of two Schools of Infantry. SOI is eight weeks long and some say it makes boot look like a walk in the park. The first four weeks cover basic field skills, fire-team, squad and platoon operations. During the second four weeks, Marines under-go training in basic operations under temperate, tropical, arctic and desert conditions.

Space Corps Infantry training isn’t over after SOI. After the eight-week SOI, the Marines report to Luna for Hostile Environment and Zero-G combat training. The school lasts 12 weeks and covers skills needed to fight and survive in environment with low to zero gravity and atmosphere. If the Marines pass space training, their next stop will be to a Marine regiment garrisoned on Earth or one of the colony worlds.

Below is a list of the Infanty Military Occupation Specialities (MOS) currently available:


  • 0311: Infantry Rifleman
  • 0317: Scout Sniper
  • 0321: Force Recon
  • 0331: Machine Gunner
  • 0341: Mortarman
  • 0351: Assaultman
  • 0352: Anti-Tank Missileman
  • 0369: Platoon Sergeant

 

Infantry MOS List

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USMSC Riflemen on Hell's Kitchen

0311: Infantry Rifleman

The largest and the oldest MOS, Infantry Riflemen represent the heart and soul of the Corps. Riflemen are the primary scouts, assault troops, and close combat forces available to the Marine Expeditionary Unit (MEU). They are the foundation of the Marine infantry organization, and as such are the nucleus of the fire team in the rifle squad and the scout team in the LAR squad. Non-commissioned officers are assigned as fire team leaders, scout team leaders, rifle squad leaders, or rifle platoon guides. 0311s can be found on almost every US warship, military space station, or major US colony.


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Marine Scout Sniper with EW4 FESR

0317: Scout Sniper

On the battle field these men are the last thing you never see. Marine Snipers are valuable assets to the battalion commander, guardian angels to Riflemen on patrol, and an invisible scourge for the enemy. The scout sniper is a marine skilled in field craft and marksmanship who delivers long range, precision fire on selected targets from concealed positions in support of combat operations. They have a secondary mission of gathering information for intelligence purposes. They participate in activities designed to deny the enemy freedom of movement by targeting enemy leaders, crew-served weapons operators, radiomen, observers, messengers, and other key personnel with precision fire. Scout snipers engage vital material targets such as command and control equipment, light armored vehicles, air defense radar, and missile launchers that require precision rifle fire to neutralize. Scout snipers also conduct close reconnaissance and surveillance operations for the infantry battalion in support of the intelligence section.



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Force Recon on New Wyoming

0321: Force Recon

These men are like ghosts on the battle field; able to slip behind enemy lines at will and hit the enemy were they least expect it. The reconnaissance man is responsible for providing the amphibious, long range, small unit, ground reconnaissance and raid skills to support the MEU. He is the nucleus of a recon team in the reconnaissance battalion or the recon or assault team in the Marine Special Operations Company (MSOC's) In addition to basic infantry skills, he is responsible for highly refined scouting and patrolling skills. He must possess advanced proficiency in scout swimming, small boat operations, close combat skills, airborne, surface and sub-surface insertion and extraction techniques, assault climbing, demolitions, forward observer procedures for supporting arms, and initial terminal guidance operations for drop ship assaults. He specializes in communications, photography, threat weapons and equipment recognition, and various types of ground reconnaissance operations. Marines assigned to assault teams possess advanced skills in assault weaponry, breaching demolitions, close quarter battle skills and raid techniques. Selected recon men are further trained as static line and free-fall parachutists, combat divers and in the use of one man orbital insertion drop pods. In planet-side ops, they launch raids behind enemy lines and disappear before reinforcements can arrive. In space, they conduct covert entry boarding operations, raids on remote enemy ports and industrial outposts and a range of black operations.


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Marine Machinegunner with M290

0331: Machine Gunner

Laying down the equivalent fire-power of a full rifle-squad, the Marine Machine Gunner is there to lay down devastating fire in support of maneuvering rifle teams. The machine gunner is responsible for the tactical employment of the 8mm medium machine-gun, the 13mm (Lucky 13) heavy machine-gun and the 30mm automatic grenade launcher. Machine gunners provide direct fire in support of the rifle and LAR squads/platoons/companies and point defense. They are located in the weapons platoons of the rifle and LAR companies and the weapons company of the infantry battalion. Machine-Gunners may be assigned to operate MMGs, HMGs and AGLs mounted on ground assault vehicles and may be tasked to support air-crews as drop-ship door-gunners in air-mobile operations. Non-commissioned officers are assigned as team leaders and squad leaders/section leaders. In ship boarding operations, they employ LMGs with frangible rounds or act as supplementary riflemen to back up the 0311s.


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Marine Mortar Team in action on Xian Cho

0341: Mortarman

Mortarmen are responsible for the tactical employment of the 70mm light mortar and the 85mm medium mortar. They provide indirect fire in support of the rifle and LAR squads, platoons, companies, and the infantry and LAR battalions. They are located in the weapons platoons of the rifle and LAR companies and the weapons company of the infantry battalion. Non-commissioned officers are assigned as mortar gunners, forward observers, fire direction plotters, and squad and section leaders. In ship boarding operations, they act as riflemen to back up the 0311s.


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Marine Assaultman with M66 MGL

0351: Assaultman

The Assaultman gets to blow things up. What more could a Marine want? He is responsible for the tactical employment of the Mark V SMAW and has additional training to conduct point demolition and breaching operations. Assaultmen provide anti-bunker and anti-armor fire in support of the rifle squads/platoons/companies and the infantry battalion, and are located in the infantry company’s weapons platoon. In ship boarding operations, 51's carry shotguns and deploy demo charges to breach hatches.


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Marine AT-Team with Peregrine Launcher

0352: Anti-Tank Missileman

One of the most terrifying threats to enemy tankers, the AT Missileman is elusive, agile and packs a punch that can defeat virtually any armored vehicle on the modern battlefield. The anti-tank missileman is responsible for the tactical employment of the Laser-Guided Peregrine AT Weapons System, the Zeus Gauss Launcher, anti-armor operations and tactical vehicle operations. They provide medium and heavy anti-armor fire in support of the infantry battalion, LAR battalion, tank battalion and the MEU. They are located in the anti-armor platoon within the weapons company of an infantry or LAR battalion, and the AT platoons of tank battalions. Just like 51's, 52's carry shotguns and demo charges in ship boarding operations.


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Gunnery Sergeant on Fiedler's Folly

0369: Platoon Sergeant

The Platoon Sergeant assists commanders and operations officers in the training, deployment and tactical employment of rifle, weapons, LAR, and antitank platoons. They are proficient in all infantry weapons systems. They supervise and coordinate the preparation of personnel, weapons and equipment for movement and combat, the establishment and operation of unit command posts, the fire and movement between tactical units, the fire of supporting arms, and the unit resupply and casualty evacuation effort. As a platoon sergeant or section leader in the rifle, scout sniper, weapons, heavy machine gun, LAR, and anti-armor platoons, he advises the platoon commander on all issues of discipline, morale and welfare.