Stump

The stump is a red ATV that has 2 guns attached to the front. It has no spot for a wingman and cannot be driven in singleplayer without cheats as it is a multiplayer exclusive vehicle.

Inspiration
The Stump appears to simply be a generic ATV

Usefulness In-Game
The Stump has very low durability (it is only a bit stronger than the Drone) however it has some of the fastest top speed and acceleration in the game. It is very lightweight and very fast so it is a very good vehicle for stunt runs if you can handle it's low to mid-range stability.