- Built for heavy-duty combat, the Buster Gundam is an artillery unit specializing in long-range assault! 
- Characterised by its two massive cannons, the Buster Gundam's iconic look has been redesigned for maximum detail, and it's SEED-specific X100 frame gives it outstanding maneuverability!
- Full of arms-specific gimmicks! 
- Recreate the massive Hyper Impulse Long-Range Sniper Rifle by docking the two smaller weapons together! 
- Gun barrel equipped with pump-action gimmick for realistic action.
- The dual sub-arms are equipped with a movement gimmick and can hold the huge weapons for dynamic firing poses.
- Shoulder-mounted missile hatches open.
- One of the five Gundams built under the Earth Alliance's G Project, the GAT-X103 Buster Gundam was created on the versatile X100 Frame, and designed to overwhelm any gunfight with its massive firepower.

- Accessories: 350mm Gun Launcher, 94mm High-Energy Rifle,
Fist (Left and Right), Open Palm (Left and Right)