GAT-X303AA Rosso Aegis Gundam

The GAT-X303AA Rosso Aegis Gundam is a Mobile Suit in the Cosmic Era and a variant of the original GAT-X303 Aegis Gundam. The "AA" stands for "Advanced Acceleration".

Combat Abilities
The Rosso Aegis is very similar to the original, in that it retains the same three modes of transformation and has nearly identical armament. However, it has two very significant advantages: Unlike the original, it can fire its devastating "Scylla" multiphase beam cannon while in either Mobile Armor Attack Mode or in a "Mobile Suit Attack Mode" in which the torso component, which covers the barrel, is removed. Also it can control the trajectory of the beam, much like the GAT-X252 Forbidden Gundam, but to a somewhat greater degree.

History
Fielded in Cosmic Era 74, the Rosso Aegis is dispatched by the Eurasian Federation and piloted by Emilio Broderick, whose loyality belongs to the Phantom Pain.

Dispatched against the Martian Turn-Delta Gundam, it and the GAT-X207SR Nero Blitz were defeating their opponent, until repeated provocation by Turn-Delta pilot Ergnes Brahe caused Emilio to go berserk.