They were insanely easy to kill in the first release, a couple of .303 rounds were enough. Now they are toughened up a bunch but to anything other than cannon-fire/bombs they seem impervious.
I tried to strafe one with a Hellcat last night, poured a lot of .50 into the lead truck and never could get it to explode. I ended up rtb after getting lots of point blank hits and hits at convergence on the lead truck with no apparant effect.
With the trucks moving at about 85mph, the low trees, and wildly uneven and undulating terrain these roads take, it's tough to strafe these truck convoys at some places. It should be possible to take out a truck with less than 4-5 passes of 6*.50's though. There's no way a .50 cal plane could kill alll the trucks the way it is right now.
thoughts? Killing trains seems easier....
-Soda