The armament was based on that of the Tribals, but replaced one twin QF 4.7 in (120 mm) Mark XII (L/45) gun on mounting CP Mk.XIX with an additional bank of torpedo tubes. These mountings were capable of 40° elevation and 340° of training. Curiously, 'X' mounting was positioned such that the blind 20° arc was across the stern, rather than the more logical forward position where fire was obscured by the bridge and masts anyway. This meant that they were unable to fire dead astern. With the tubes now 'pentad', a heavy load of 10 Mk.IX torpedoes could be carried. AA armament remained the same, consisting of a quadruple QF 2 pdr gun Mark VIII on a Mk.VII mounting and a pair of quadruple 0.5 in Vickers machine guns. Armament was further improved by replacing the quadruple machine guns with 20 mm Oerlikons. These ships, when completed, had a comparatively heavy close range AA armament. Fire control arrangements also differed from the Tribals, and the dedicated high-angle (H/A) rangefinder director was not fitted, instead only a rangefinder was carried behind the nominally dual purpose Director Control Tower (DCT). In the event, the rangefinder was heavily modified to allow it to control the main armament for A/A fire, and was known as the "3 man modified rangefinder". These ships used the Fuze Keeping Clock HA Fire Control Computer.