In front of you is another World War II vehicle, the M18 Hellcat. The M18 was a destroyer with a high top speed, but very weak armor at that. Its turret has an open top, which provides better visibility, but also less protection for its occupants.
This mod adds an M18 with two different colorations to the game. The main gun works, while the 50-caliber MG on top can be operated by a passenger.