A heavy bomber used by the RRA during the Second Unification War. Equipped with a multitude of guns and a powerful trio of jet engines on each wing the FA-21 was intended to outrun the EZ-4 and make a chase difficult for the V-35 at high altitudes. Unlike other vehicles, the FA-21B was only inspired by Gebetan designs of the period and was a vehicle designed and produced without reverse engineering or licensing a Volkish vehicle. The FA-21B was incredibly heavily armed, with five full-size turrets each containing four 40mm autocannons and two 7.92mm rotary machine guns and one half-size rear-facing turret which contained two 40mm cannons and two 7.92 MG's. The Krel sacrificed payload and potential speed for survivability and was one of the most feared weapons in the RRA's arsenal because of it. Variants existed which ditched the turrets for a more streamlined approach, and both often flew alongside each other, one providing cover for the other.