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The United States Marine Corps Infantry Rifleman, designated as Military Occupational Specialty (MOS) 0311, represents the cornerstone of Marine combat operations. Every Marine is a Rifleman is more than just a motto—it’s a fundamental philosophy that embodies the core fighting spirit of the Marine Corps. These highly trained professionals are the primary assault and close combat forces, serving as the critical tip of the spear in expeditionary warfare.
Core Responsibilities of a Marine Corps Rifleman
The MOS 0311 Rifleman carries an immense responsibility in Marine Corps operations. Their primary mission is to:
- Locate, close with, and destroy enemy forces through precise fire and tactical maneuvers
- Conduct reconnaissance patrols to gather critical intelligence
- Provide suppressive fire during squad assaults
- Protect and secure military installations
- Support humanitarian assistance operations
Essential Skills and Training
Becoming an MOS 0311 Rifleman requires exceptional physical and mental capabilities. Candidates must meet rigorous requirements, including:
- Minimum GT score of 80 or higher on the ASVAB
- Completion of Marine Rifleman Course at School of Infantry
- Expert marksmanship with various weapon systems
- Advanced land navigation skills
- Tactical Combat Casualty Care proficiency
Weapon Systems and Equipment
MOS 0311 Riflemen are trained to operate a diverse array of weapons, including:
| Weapon System | Primary Use |
|---|---|
| M4 Service Rifle | Primary individual weapon |
| M249 Squad Automatic Weapon (SAW) | Suppressive fire |
| M203 Grenade Launcher | Indirect fire support |
| AT-4 and M72 LAW Rockets | Anti-armor capabilities |
Squad and Platoon Integration
Within the Marine Corps infantry structure, 0311 Riflemen form the backbone of tactical units. A typical configuration includes:
- Four-person fire teams led by a corporal
- Thirteen-Marine rifle squads
- Specialized roles like automatic rifleman and grenadier
🔍 Note: As of 2025, the Marine Corps continues to evolve the 0311 role to enhance adaptability in complex operational environments.
The journey of an MOS 0311 Rifleman is challenging, demanding unwavering commitment, physical excellence, and mental resilience. These Marines represent the ultimate embodiment of the Corps' fighting spirit, ready to deploy anywhere in the world at a moment's notice.
What are the basic requirements to become an MOS 0311?
+Candidates must be U.S. citizens, have a high school diploma, pass the ASVAB with a GT score of 80 or higher, complete boot camp, and successfully graduate from the School of Infantry Infantry Training Battalion (ITB).
How often do MOS 0311 Riflemen qualify with their weapons?
+Marines must complete the Annual Rifle Qualification (ARQ) under MCO 3574.2M, which assesses marksmanship in combat-centric scenarios up to 500 yards. Qualification requires at least 15 “Destroys” out of 50 target hits.
What makes the MOS 0311 role unique in the Marine Corps?
+MOS 0311 Riflemen are the primary ground combat element, embodying the Marine Corps’ philosophy that “Every Marine is a Rifleman” and serving as the core of infantry operations across various global environments.