I thought that after the FR-13 Mantis Lambda there had to be an FR-14 Ant Lambda too ;)
The truck has completely revised mechanics and it now has independent suspensions, similar to the ones on the Mantis Lambda but reinforced and stiffer in order to be able to carry loads; It comes with all the trims of the Mantis Lambda plus a right side mirror and additional horns, this particular version was fit too with a tank for the transportation of fluids such as fuel or water.

Since it was meant to be capable of delivering goods across difficult terrains, the truck was tested, as usual, on Rattlesnake Racetrack and Mirage Speedway; it turned out to be pretty good at offroading and even handling better than the Mantis Lambda thanks to the stiffer suspensions. Moreover, the truck was put to the test on a special expedition to reach the top of Krakabloa's volcano: while it could not climb to the very top it could still handle steep climbs of 30° thanks to the 4-wheel steering, which is not a bad result given the limited power of the engine.

Hope you have fun with this :)

Additional notes:
-The truck has optional 4-wheel steering like on 6-wheelers and it disables automatically at high speeds (>150 kp/h), press AG7 to enable it; press AG8 for cruise control (it disables throttle input) and AG1 for lights
-As i use analog controls, this truck might have a messed control setup for you, it uses reverse Pitch as throttle and Yaw as steering, but you can easily set those up as it uses rotators for steering and the engine is easy to reach; also you might want to reduce steering speed on those rotators if you drive it by keyboard, it will make it more controllable

Credits to @FishMiner for making the FR-14 Ant and again for making the FR-13 Mantis, fun simple lightweight platforms with tons of customization possibilities.
If you like this build i suggest you to check these out if you are interested in making a version of your own