11B Infantryman vs 11C Indirect Fire Infantryman
Both are infantry jobs you reach through the same 11X contract and the same Fort Benning training. The 11B Infantryman closes with the enemy by rifle and maneuver, while the 11C Indirect Fire Infantryman drops mortar rounds on targets from behind cover.
Quick Comparison
| Decision point | 11B Infantryman | 11C Indirect Fire Infantryman |
|---|---|---|
| Core role | Engages enemy forces in close combat, executes patrols and ambushes, secures terrain, and operates as part of a fire team and squad. | Operates 60mm to 120mm mortar systems, computes firing data, delivers indirect fire, and works in the Fire Direction Center to suppress enemy positions from behind cover. |
| Test gate | ASVAB. No security clearance required for the standard assignment. | ASVAB. No security clearance required for the entry-level assignment. |
| Score summary | Combat (CO) line score of 87 minimum. AFQT 31 (diploma) or 50 (GED). | Combat (CO) line score of 87 minimum. AFQT 31 (diploma) or 50 (GED). |
| Training path | A single 22-week One Station Unit Training (OSUT) course at Fort Benning, Georgia, then straight to the first unit. | A 22-week One Station Unit Training (OSUT) course at Fort Benning, Georgia: about 7 weeks of basic soldiering, then 15 weeks of mortar gunnery and fire-direction work. |
| Work setting | Garrison home station, multi-week field rotations at training centers, and forward operating or patrol bases in any climate on deployment. | Garrison motor pools and training areas, multi-week field rotations at firing points, and forward operating or patrol bases on deployment. |
| Deployment pattern | Roughly 9 to 12 months deployed, then 18 to 24 months at home station. High-readiness units can deploy within 96 hours. | Roughly 9 to 12 months deployed, then 24 to 36 months at home station. High-readiness units deploy with less notice. |
| Best fit | People who thrive on physical challenge, train hard without being told, and want the most traditional front-line ground-combat role the Army offers. | People who like precision math under pressure, want a hands-on combat role that uses brains as much as muscle, and can work in a tight 3-to-5-person crew for months. |
| Less ideal if | People who need a predictable schedule, want a job that maps to a civilian license, or have chronic joint, back, or knee problems. | People who need a predictable schedule, dislike math or spatial reasoning, want an obvious civilian equivalent, or have hearing sensitivity. |
If you want to be in the direct fight with a rifle, start with the 11B Infantryman profile. If you want to run the mortars that support that fight, start with the 11C Indirect Fire Infantryman profile.
Qualification Gates
The gates are nearly identical. Both need a Combat (CO) line score of 87, one of the lowest in the Army, and neither requires a security clearance to start. You enlist under the same 11X infantry contract, and the Army assigns 11B or 11C during training based on its needs.
The real difference is aptitude, not the score. The 11C leans harder on math and spatial reasoning for firing calculations, so build a solid base with our ASVAB study guide before you ship.
Work Environment
Both jobs split time between garrison, multi-week field rotations, and deployment. The 11B operates as a rifleman inside a fire team and squad, closing the last distance to an objective. The 11C works as part of a tight 3-to-5-person mortar crew, usually firing from a position behind the front line.
Some 11C soldiers never touch the gun line at all. They work in the Fire Direction Center, computing the deflection and elevation data that puts rounds on target.
Training Path
The pipeline is the same length for both: a 22-week One Station Unit Training (OSUT) course at Fort Benning, Georgia. The first seven weeks teach the basic soldier skills every infantryman learns.
The back half is where they split. The 11B spends it on marksmanship, battle drills, and squad tactics, while the 11C spends about 15 weeks on mortar gunnery and fire-direction work.
Which One Fits You
Choose the 11B if you want to be in the direct fight and like the idea of closing with the enemy on foot. Choose the 11C if you want a combat role that rewards precision and quick math under pressure.
Neither job is easy, and both run on the same physical standard. The mortar systems are heavy, and a 120mm baseplate alone weighs over 130 pounds.
The same test opens both doors. Lock in your ASVAB score, talk with a recruiter about the 11X contract, and compare other Army career guides before you sign.