In the year AC 195, rebel space colonists send five Gundams to Earth to wage war against the opressive Alliance. Of the five Gundams that would be built, Doctor J's XXXG-01W Wing Gundam most closely resembled the original Wing Zero in form and armament. Packing beam sabers, vulcan guns and machinecannons, its weaponry was topped off by its powerful "buster rifle," capable of firing an energy beam wide enough to destroy several enemy mobile suits in a single shot. The buster rifle's only drawback was that it was only good for three shots before it needed to be recharged. "Gundam 01," as it was code-named by the OZ forces, was also capable of transforming into a fighter-like "bird mode" for added mobility and atmospheric flight.

Though the ill-fated Wing Gundam is intercepted during re-entry and spends most of the following months either blown to bits or sitting at the bottom of the ocean, it's nonetheless a superb example of mobile suit engineering. Built of nearly-indestructible gundanium alloy, the Wing Gundam could withstand everything from heavy weapons fire to direct missile hits. These factors made the Wing Gundam an extremely tough mobile suit to stop when it was launched to Earth to fight OZ during Operation Meteor in AC 195. And in the hands of its pilot, Heero Yuy, it was truly a force to be feared.

Source: Gundamproject.com, New Mobile Report Gundam Wing