Everything Oshkosh built in the way of airport fire engines was listed under the designation M Series – Aircraft crash/fire/rescue vehicles.
These included vehicles with 4×4, 6×6 and 8×8 drive. At that time this M-1000 was one of the small fire engines of the M Series with 4×4 drive, the 1000 standing for the capacity of the water tank, namely 1000 gallons (3785 litres).
In the 1970s, when Oshkosh already had a very extensive range of airport fire engines, the vehicles were classed by the size of their water tanks.
- 4000 liters – 1057 gallons
- 6000 liters – 1585 gallons
- 9000 liters – 2378 gallons
- 12000 liters – 3170 gallons
- 15000 liters – 3963 gallons
- 23000 liters – 6076 gallons