The Sergeant has TL Melta Guns, but the Centurion Marines will have TL Flamers. The Frag Assault Launchers in the chests will ensure they get into battle across terrain in a fit state and if charged may help them survive limiting the number of attacks. And those Siege Drills will make short work of Terminators, Vehicles and most Monstrous Creatures (if survive on Initiative). But I think they'll need a Landraider/StormRaven to get across the field!
56 minutes ago