Now to the RPGs
The following units are armed with weapon 19, the RPG-7V.
269 408 413 434 435 461 462 477 488 518 519 520 703 740 762 770 770 774 777 779 787 988.
These should be rearmed with weapon 18, the RPG-7.
The RPG-7V is probably supposed to represent one of the high end RPG warheads. In reality however the iraqis had to make to do with the usual PG-7G/PG-7M and the likes, capable of roughly 330mm of penetration.
Some higher end weapons have been used by the insurgents but in very small quantities only and definitively were not in widespread service in the old iraqi army (or the new one for that matter).
Weapon 156 should be enough to represent those few modern RPGs.
You can read the naval explosive ordnance disposal division reports here:
https://naveodtechdiv.jeodnet.mil/IraqOIG/iraqoig.asp
The RPG warheads are under the "rocket" list. It is a very comprehensive list of the ordnance found in Iraq.