In Command & Conquer mode, the shotgun troopers are armed with the Vulture shotgun as their main weapon. They are very effective up-close against infantry, being able to dish heavy damage to even the most high-tier characters. However, they do negligible damage to vehicles and structures.
Both GDI and Nod shotgun troopers use the same models as the rocket soldiers from the campaign. The latter do not appear in multiplayer since their role is already fulfilled by the rocket soldier officers.