91A M1 Abrams Tank System Maintainer
Verified ASVAB line score requirement from the official Army specification. Mechanical Maintenance: Repair of wheeled and tracked vehicles, generators, weapons and construction equipment.
MM ≥ 99 or (MM ≥ 88 and GT ≥ 90)
Chapter 10c initial entry qualification.
Verified
Source checked 2026-09-12
What this means
Official Army Chapter 10c PDF qualifying-score section verified; non-score requirements remain separate.
The score listed above is the minimum line score threshold from the official Army MOS specification. Meeting this threshold does not guarantee enlistment — additional requirements such as OPAT physical testing, security clearance, medical screening, and training availability are evaluated separately by your recruiter. To see how MM 90 compares with the rest of the Army, read what counts as a good ASVAB score.
Which ASVAB subtests count toward 91A
91A is judged on 2 line scores. The subtests listed below are the Army's nominal definition of each aptitude area from DA PAM 611-21, Military Occupational Classification and Structure, Table 10-1 (ASVAB aptitude area composites). The score actually printed on your report is computed on the 1997 scale as a weighted sum of seven standard scores (DMDC 2004, Table 2.7) and may give weight to subtests outside the nominal list; GT is the exception and equals AR + VE exactly. Use the line score on your report, or compute it from your standard scores.
NO + AS + MC + EI
NO (Numerical Operations), AS (Auto and Shop Information), MC (Mechanical Comprehension), EI (Electronics Information).
NO is a legacy subtest no longer administered; the Army scores MM from the remaining subtests.
VE (verbal: WK and PC) + AR
WK (Word Knowledge), PC (Paragraph Comprehension), AR (Arithmetic Reasoning).
If your score is below MM ≥ 99 or (MM ≥ 88 and GT ≥ 90)
Your ASVAB report lists every line score, so start by finding MM and GT and noting the exact gap. A small gap in one composite is usually closed by improving the subtests that feed it, and each subtest counts toward several line scores at once.
Practice on this site: AS (Auto and Shop Information), MC (Mechanical Comprehension), EI (Electronics Information), WK (Word Knowledge), PC (Paragraph Comprehension), AR (Arithmetic Reasoning). Start a AS, MC, EI, WK, PC, AR practice set for 91A →
Not testable: NO no longer appear on the ASVAB, so there is nothing to practice for them.
A retest is subject to Army retest rules and timing; ask your recruiter before planning around one. Practice results here are raw scores and never convert into an official line score.
Mechanical Maintenance jobs ranked by ASVAB threshold
All 12 currently verified CMF 91 entries on this site, ordered by the lowest score that satisfies each rule. 91A sits at position 9: 8 jobs list a lower threshold and 1 lists a higher one. Thresholds in different line scores are not directly comparable.
| # | MOS | Job | ASVAB requirement | Checked |
|---|---|---|---|---|
| 1 | 91H | Track Vehicle Repairer | MM ≥ 90 or (MM ≥ 85 and GT ≥ 85) | 2026-09-12 |
| 2 | 91J | Quartermaster and Chemical Equipment Repairer | MM ≥ 87 or (MM ≥ 82 and GT ≥ 85) | 2026-09-12 |
| 3 | 91L | Construction Equipment Repairer | MM ≥ 87 or (MM ≥ 82 and GT ≥ 85) | 2026-09-12 |
| 4 | 91B | Wheeled Vehicle Mechanic | MM ≥ 92 or (MM ≥ 87 and GT ≥ 85) | 2026-09-11 |
| 5 | 91F | Small Arms/Artillery Repairer | GM ≥ 93 or (GM ≥ 87 and GT ≥ 85) | 2026-09-12 |
| 6 | 91S | Stryker Systems Maintainer | (MM ≥ 87 and GT ≥ 85) or MM ≥ 92 | 2026-09-12 |
| 7 | 91C | Utilities Equipment Repairer | GM ≥ 93 or (GM ≥ 88 and GT ≥ 85) | 2026-09-12 |
| 8 | 91D | Power-Generation Equipment Repairer | GM ≥ 93 or (GM ≥ 88 and GT ≥ 85) | 2026-09-12 |
| 9 | 91A | M1 Abrams Tank System Maintainer | MM ≥ 99 or (MM ≥ 88 and GT ≥ 90) | 2026-09-12 |
| 10 | 91M | Bradley Fighting Vehicle System Maintainer | MM ≥ 99 or (MM ≥ 88 and GT ≥ 90) | 2026-09-12 |
| 11 | 91P | Artillery Mechanic | MM ≥ 99 or (MM ≥ 88 and GT ≥ 90) | 2026-09-12 |
| 12 | 91E | Allied Trades Specialist | (GM ≥ 88 and GT ≥ 95) or GM ≥ 98 | 2026-09-12 |
Other Army jobs judged on MM (Mechanical Maintenance)
Because these MOS share the MM line score with 91A, the same subtests decide your standing for all of them. Jobs at or below 91A's threshold are fallback options; jobs above it are what a higher MM unlocks.
- 91L Construction Equipment Repairer — MM ≥ 87 or (MM ≥ 82 and GT ≥ 85)
- 91H Track Vehicle Repairer — MM ≥ 90 or (MM ≥ 85 and GT ≥ 85)
- 91B Wheeled Vehicle Mechanic — MM ≥ 92 or (MM ≥ 87 and GT ≥ 85)
- 91S Stryker Systems Maintainer — (MM ≥ 87 and GT ≥ 85) or MM ≥ 92
- 91M Bradley Fighting Vehicle System Maintainer — MM ≥ 99 or (MM ≥ 88 and GT ≥ 90)
- 91P Artillery Mechanic — MM ≥ 99 or (MM ≥ 88 and GT ≥ 90)
- 14G Air Defense Battle Management System Operator — MM ≥ 91 and GT ≥ 90
- 14H Air Defense Enhanced Early Warning Operator — MM ≥ 91 and GT ≥ 90
- 14E Patriot Fire Control Enhanced Operator/Maintainer — MM ≥ 92
- 15R AH-64 Attack Helicopter Repairer — MM ≥ 99
- 88K Watercraft Operator — MM ≥ 99
- 88L Watercraft Engineer — MM ≥ 99
Next steps
- Check your scores against this and other Army jobs
- Practice AS, MC, EI, WK, PC, AR, the subtests that feed the MM and GT score
- Browse all Mechanical Maintenance jobs in CMF 91
- Confirm the current requirement with your recruiter before relying on this information
Frequently asked questions
What ASVAB score do I need for 91A M1 Abrams Tank System Maintainer?
The verified score threshold recorded for this MOS is MM ≥ 99 or (MM ≥ 88 and GT ≥ 90). Other requirements such as OPAT, clearance, and training are separate.
Which ASVAB subtests count toward the MM and GT score for 91A?
MM (Mechanical Maintenance) is nominally NO + AS + MC + EI. GT (General Technical) is nominally VE (verbal: WK and PC) + AR. The reported score is a weighted sum of seven standard scores on the 1997 scale, so subtests outside that list can also count. Compare the line score printed on your ASVAB report against MM ≥ 99 or (MM ≥ 88 and GT ≥ 90), or compute it from your standard scores with the calculator.
Is AFQT enough to qualify for 91A?
No. AFQT is used for general enlistment qualification. 91A uses specific Army line scores (MM ≥ 99 or (MM ≥ 88 and GT ≥ 90)), and the line-score rule shown here is the verified threshold. These are composite scores calculated from ASVAB subtests and are different from your AFQT percentile.
Are there Mechanical Maintenance jobs with a lower ASVAB threshold than 91A?
Yes. Among the 12 currently verified CMF 91 entries on this site, 8 list a lower entry threshold than 91A and 1 list a higher one. The ranked table on this page shows each requirement; a lower threshold in a different line score is not directly comparable to MM ≥ 99 or (MM ≥ 88 and GT ≥ 90).
Where does this 91A score requirement come from?
The verified threshold is recorded from the official Army MOS specification document. Chapter 10c initial entry qualification. Source checked on 2026-09-12.