Water Trailers ("Water Buffalo"), Various NSN's.  

The COEI / BII Listings and Component Hand Receipts on ArmyProperty.com are valid for the following water trailers.  Be advised, however, that the Technical Manual lists NO components or BII for these trailers.  A water buffalo is considered "complete" if it is serviceable, i.e. in good working order.
NSN Model
2330-00-542-2039 M149
2330-00-832-8801 M149A1
2330-01-108-7367 M149A2

Related End Items ("Also See...")

NSN Description
(Various) HMMWV (most models); or, M1114 series
(Various) LMTV Series Cargo Truck (4 x 4, 2.5-Ton)
(Various) FMTV Series Cargo Truck (6 x 6, 5-Ton)
(Various) 2.5-Ton Truck.  Old / obsolete, "Deuce and a Half" M35-series cargo truck, which has been replaced, in many units, by the LMTV Series.
(Various) HEMTT Cargo Truck (8 x 8, 10-Ton)
(Various) M101-Series Cargo Trailer
(Various) M105-Series Cargo Trailer

Picture:  M149A2 Water Buffalo with "wash station"