This paper model is a M151A2 Mutt with Trailer, created by Agwipo, and the scale is in 1:25. The M151A2 fielded a significantly revised rear suspension that greatly improved safety in fast cornering.
The M151 (Truck, Utility, 1/4-Ton, 4×4, M151) now had Semi-trailing arm suspension. Many smaller upgrades including improved turn signals. The A2 can be identified by the large combination turn signal/blackout lights on the front fenders, which also had been modified to mount the larger lights, as opposed to earlier A1's that had flat front fenders.