In large maps, it is difficult to put AT gun and ammo together. AT guns can be attached and easy to set up, but they only have 5 rounds of ammo, and ammo trucks are expensive and so fragile. while ammo crates are extremely slow to move around.

It'll be good if some jeep or cars can carry heavy ammo box to the front, or heavy ammo trucks loaded with heavy ammo box, so you can drop them right next to the AT gun.