This is a system of army trucks, all using common parts.there are a few inconsistencies with the pictures because Adv Dupe2 was being a cunt. Ignore them.
RAC-2420 light army truck. Can carry, without even swaying, its own baseprop weight on the bedrails due to the low center of gravity.
Open and closed body troop carriers, flatbed or bedless
RAC-3630 medium army truck. 3+ ton payload. The base prop has had an addition welded over the rear, extending to the new end of the bedrails but also positioned to help carry loads better, and the walking beam suspension is connected to both
The walking beam
RAC-3650. Beefed-up suspension & frame. The rear carries much more weight--while it's comfortable at 5 tons, I can climb the central hill on buttes and do hard 40mph cornering without a rollover at 12 tons, which is 3-4x the weight of its base props.
All vehicles have a basic cab which seats two. Has holo faux gearshifter, pushbutton ignition, and horn.