I just noticed that Iraq has established a new arms industry last year which is named “Technical Directorate for Military Production”. The name sounds a bit centralized. Maybe run by the same people as before 2003 (those still alife).
So far all sort of ordnance are made (or planned) and some do look a bit improvised.
Iran and others seem to be involved.
By now I have not found anything on small arms ammo but will keep looking.