| Model | NSN | Engine | Transmission | GVWR |
|---|---|---|---|---|
| M915 | 2320-01-028-4395 | Cummins Model NTC-400 400 bhp@2100rpm Big Cam I | Caterpillar 7155 Semi-automatic 16fwd, 2rev | 50,000 lbs |
| M915A1 | 2320-01-125-2640 | Cummins Big Cam II | Allison HT-750 CRD | 50,000 lbs |
| M915A2 | 2320-01-272-5029 | Detroit Diesel Series 60 430hp, 1450 lb-ft torque | Allison HD4560P 6 speed automatic | 52,000 lbs |
| M915A3 | 2320-01-432-4847 | Detroit Diesel S60 | Allison HD4560P | 52,000 lbs |
| M915A4 | 2520-01-458-1207 | M915 or M915A1 engine | Allison HD4560P | 52,000 lbs |
| M915A5 | 2320-01-552-2922 | Detroit Diesel S60 500hp, 1650 lb-ft torque | Allison 4500SP 6 speed automatic | 120,000 lbs (GCWR) |