Good call bamaranger
Have used the GI cold weather parka for many years. Not only hunting, but kept one rolled up and tucked away in the motorcycle saddle bags for long vacation trips. Never knew where we were going to end up and a few overnight tent stays up in the mountains, the parka came in handy.
and is mildly water resistant, but its not a rain coat.
You are right as well about the parka being mildly water resistant but water resistance in the parka can be greatly increased by spraying it down with a waterproofing, silicone spray...
...still not a raincoat though.