Overall, the diorama looks very good, it gives a dynamic feel to the action portrayed. Actually, I like the blue on the one figure, in that part of the world bright colors really stand in contrast to the dust.
The truck is nicely done, but the Mujahideen are not know for driving skills, maintenance, or cosmetic upkeep, I little more rusting, denting and bare metal (even on small parts of the sidearms) would have made it a bit more realistic (Easier said than done, I know.)
Actually, it's only the tires that really need work, they are way too clean to be realistic. Not only that, but the rocket launcher assembly weighs at least a ton, and the tires don't reflect any load. Maybe one day model companies will offer truck tires with flat spots the way some aircraft models do.