Plumbata - Man at Arms weapon
The Man at Arms get throwing knives? That seems a bit Fantasy/D&D for my liking.
The Late Roman / Byzantine army used plumbata, a lead weighted throwing dart. It fits in with their character more as a Mason MAA wears lamellar (Late Roman armour) and a Spangenhelm/Burgh Castle helmet hybrid (again, Late Roman).
Worth adding as an additional ranged option or replacing the knives…