Hello Greg!
In the Brutaka set he appears to have two smaller extra arms on his back holding his daggers, so are these only a set thing for storage of the daggers, or does he have four arms? If so, would this be a trait found in all members of his species?
Folded up on the back:
Official Greg Discussion | Page 161
18. Are the arms that hold Brutaka’s knives mechanical, or are they extra arms?
18) They’re mechanical, they’re not arms.