The Gundam AGE-FX is equipped with a pair of beam sabers in its forearms, similar to the AGE-3 Gundam AGE-3 Normal. The new Stungle Rifle is more powerful than the SigMaxiss Rifle and can be further enhanced with the Daidal Bazooka add-on. But the area where the Gundam AGE-FX shines is its C-Funnels, which are stored across its body. Kio can control these remote weapons with his mind, using them both offensively and defensively. The suit can also make use of FX Burst, a high performance mode that dramatically raises its power levels at the cost of precision control. With the assistance of C-Funnels, Kio can fight equally against Vagan X-Rounders and their remote bit-equipped mobile suits.
The head design of Gundam AGE-FX is different among other Gundam-type mobile suits. It has a blue antenna on the back which enables Kio to control the C-Funnels. There is also a single horizontal line across the mouthpiece and its chin is colored blue instead of the standard red.
Similar to its predecessors being homages of the first 3 lead Gundams of the Universal Century, the Gundam AGE-FX serves as homage to the Nu Gundam due to having funnel weapons.
