No, it doesn't show it in NILE, but the turrets are there. When you go to play the map, you will see them.
The weapons are there automaticly. Like the vehicle IC: Desert SUV (50 CAL) has a 50 on top, but a IC: Desert SUV (MK19) has a grenade launcher on top.
It doesn't show them in NILE, but they are there.
The individual weapons like the turrets are for placement weapons. Like in the map Big Ship, on the ends of the ship were turrets on top of round sand bags.