The ZGMF-X11A Regenerate Gundam is derived primarily from the GAT-X303 Aegis Gundam, and like the Aegis, it can transform between Mobile Suit (MS) Mode, Mobile Armor (MA) Mode and Mobile Armor Cruise (MA Cruise) Mode. With a height of 35.61 meters, it was the largest mobile suit ever built until the appearance of the GFAS-X1 Destroy Gundam and was often mistaken as a ship when it moves in MA Cruise Mode. Like the other ZGMF-X series Gundam units produced by ZAFT during the First Alliance-PLANT War, the Regenerate is equipped with Phase Shift armor, Neutron Jammer Canceller, and is powered by a nuclear reactor.
The Regenerate's body is made from a combination of seven modules: the Core Unit which serves as the backpack in MS Mode, the chest unit which contains the MS's head, the waist unit which contains the front and side skirt armor, and four other identical units which can transform into arms or legs. Each module can transform into independent spacecraft and with spares being stored onboard Regenerates' mothership, damaged parts of the suit's body can be easily replaced. This is the reason why the mobile suit is named 'Regenerate'.