The XXXG-0SR Gundam Sandrock (aka Sandrock , Gundam Zero-Four or Sandrock Ver.Ka.) is a mobile suit from the manga Mobile Suit Gundam Wing Endless Waltz: Glory of the Losers and is piloted by Quatre Raberba Winner.

The Sandrock was constructed by Instructor H in the L4 colonies under the financial support of the Winner family. Designed for operations on land, especially in a desert environment, it has high combat capabilities and excels in melee combat with its strong armor that is more robust than other Gundams'. In addition, it has advanced communication and information analysis systems as it was designed as a commander unit and tasked to be the core of the command system for the Maganac Corps and the five Gundams. Following its self-destruction and then restoration by the Maganac Corps, the Sandrock was painted in a new bluish-purple color scheme.