Hart Armaments was approached by an anonymous client, who wanted a customized variant of the Arjan II series to be used in air shows.

The same client provided the materials necessary to create the joining components between the full-wing control surface system and the rest of the aircraft. Since delivering the Arjan II C to the client, Hart Arms has been unable to replicate the material.

The Arjan II C is almost supernaturally maneuverable, owing to a system of control surfaces that utilize the entirety of the main wings, the tail, and the canards. The Hart-Arms test pilot is on record describing the aircraft's roll rate as "roughly eleventy-trillion-million degrees per second."

They're pretty sure they stripped all the weapons before using the Arjan II A fuselage. Pretty sure... Yeah...