http://gundam.wikia.com/wiki/ORX-005_Gaplant_TR-5 Found the tr-5 but not much info on it.

As for actually using a mobile armor I have one question and one concern.
Fist have the players had to fight a mobile armor yet? Because that would be a bit of a boss fight I would think. And 2nd will our enemies have the firepower to fight off an advancing mobile armor as well as the rest of our suits and supporting suits.

I don't think a player should have a Mobile Armor personally it is way to strong and in all the series it takes a team effort or the main character in some desperate fight to take them out. But that's just my opinion