I am now releasing version 1.0 of my Pyro Ammunition Freighter. The model is available for download on my FileShare page, which can be found in my signature.
This model is based on an American vessel, and so should be assigned to the United States. The UK and Japan also operated very similar vessels. I know that Germany, Italy, and France had ammunition freighters but I don't know if they looked similar to this one.
* NOTE - The skin in the second picture is just an unmodified NAXC/NPTR skin which is not included with this model.
I will check back tomorrow morning for feedback.