Clone heavy trooper
From Wookieepedia, the Star Wars wiki.
The clone heavy troopers were heavy weapons specialists, Advanced Recon Commandos in the Grand Army of the Republic during the Clone Wars, possibly a variant of the ARC heavy gunners. Some Commanders, such as Commander Bacara, were equipped with clone heavy trooper armor such as the cheek plating, and Kamas.
The heavy weapons commandos carried Merr-Sonn PLX-1 missile launchers, blaster pistols, V-1 thermal detonators, HX2 antipersonnel mines and other ARC trooper equipment.
They should not be confused with the clone heavy gunner.
[edit] Behind the scenes
In Star Wars: Battlefront II the clone soldiers called "heavy troopers" wore armor very similar to that of Commander Bacara of the Galactic Marines, making some confusion that heavy troopers were a division of the Galactic Marines. The heavy troopers handle anti-vehicle and anti-armor duities of the Republic.
