Since the Mod Messup page died due to unknown causes, this is basically the second link of Mod Messup. JK! It's actually it's own mod, but it's estimated to be released along with Mod Messup. Plus it's demo will also be stuffed along with the Mod Messup Demo so there will be two mods released in one!
This thing is good, it works for you so don't kill it when you see it in game. It is the standard APC for the TF:RE forces. The only thing I need to add on it are the interiors and even more details. Have you figured out what the mod is about yet? This vehicle and most of the weapons are small hints.