Marines
MOS 0331
Machine Gunner
Marines 0331 (Machine Gunner) typically involves combat-oriented field operations, ordnance and weapons handling.
Common Exposures
🪖 Combat/Stress
Direct combat exposure, hostile fire, IED blasts
🔊 Noise
Weapons fire, explosions, vehicle noise
💪 Physical Strain
Heavy gear, marching, physical demands
🌦️ Environmental
Extreme weather, dust, sand, burn pits
🔊 Noise
Weapons fire, explosions during testing
🧪 Chemicals
Gun cleaning solvents, propellants, explosive residue
💪 Physical Strain
Lifting heavy ordnance and equipment
Likely Service-Connected Conditions
| Diagnostic Code | Condition | Likelihood | Reasoning |
|---|---|---|---|
| 5237 | Lumbosacral or cervical strain | High | Heavy gear and physical demands cause back strain |
| 6260 | Tinnitus, recurrent | High | Weapons fire and explosions cause tinnitus |
| 9411 | Posttraumatic stress disorder | High | Combat exposure commonly causes PTSD |
| 5257 | Knee, other impairment | Medium | Marching and physical demands affect knees |
| 6847 | Sleep Apnea Syndromes | Medium | Deployment stress and irregular sleep patterns |
| 8045 | Residuals of traumatic brain injury (TBI) | Medium | Blast exposure risk for traumatic brain injury |
| 8100 | Migraine | Medium | Blast exposure and stress cause migraines |
| 9434 | Major depressive disorder | Medium | Combat stress and deployment separation |
☢️ PACT Act & Toxic Exposure
Select the era that best matches when you served to see how this job’s toxic exposures changed over time.
Vietnam Era
📅 1962-1975
No era-specific PACT Act crosswalk data is available for this job in that time period.
Cold War Era
📅 1945-1991
No era-specific PACT Act crosswalk data is available for this job in that time period.
Gulf War Era
📅 1990-2001
No era-specific PACT Act crosswalk data is available for this job in that time period.
Post-9/11 Era
📅 2001-present
No era-specific PACT Act crosswalk data is available for this job in that time period.