Bastion Siege Automaton B73

Bastion Siege Automaton B73s are a type of omnic. Modified NS versions of this model of Bastion were used by Null Sector during the King's Row Uprising.

Trivia
B73 Bastions are a similar model to the E54s used before and during the Omnic Crisis. In terms of appearance and abilities, there appears to be no outward difference between the two models.