The XXXG-01H2 Gundam Heavyarms Custom (aka Heavyarms Kai or Gundam Zero-Three) is the upgraded form of the XXXG-01H Gundam Heavyarms introduced in the Mobile Suit Gundam Wing anime. It is piloted by a young man operating under the pseudonym Trowa Barton.
An upgrade of the Heavyarms to make it worthy for space combat. Besides minor changes to its armor, it has added verniers on the front and rear skirt armor as well as on top of the backpack to enhance its mobility in zero-gravity environment. Its armaments are unchanged with the exception of the Beam Gatling, which has been upgraded into the more powerful Twin Beam Gatling.
