The XXXG-01SR2 Gundam Sandrock Custom (aka Sandrock Kai or Gundam Zero-Four) is the upgraded version of XXXG-01SR Gundam Sandrock in Mobile Suit Gundam Wing. It is piloted by Quatre Raberba Winner.
An upgrade of the original Gundam Sandrock to make it capable of space combat. Verniers were added to the shoulder, back skirt, backpack, and legs to increase mobility in space. As the added backpack vernier took the place of the mounting point for the shield, the Gundam Sandrock Custom can no longer use the Cross Crusher. It also gains a beam machine gun for better mid-range combat capability in space. Like the original, the Sandrock Custom can function as a commander unit for team operations.
