In terms of appearance only, a suit of Operative Armour stands nearly three meters tall, has a greatly enlarged torso structure & a mirrored faceplate. The OA design is not generally sold, instead only being used by Starfire Security, additionally the OA is only produced in glossy black for standard Operatives & Crimson for the Praetorian Guards. The OA design was partly inspired by several different suits of armour used by both the Grand Army of the Republic & the Galactic Empire. The form of the body is based on the Blaze Trooper Armour from the Grand Army of the Republic. However, as the design crew was unable to acquire a suit of Blaze Trooper Armour, the similarities end with physical appearance.