All of the ships of the class mounted four 45-calibre 4.7-inch Mk IX guns in single mounts, designated 'A', 'B', 'X', and 'Y' from front to rear. For anti-aircraft (AA) defence, they had a single QF 3-inch 20 cwt AA gun between her funnels. The C-class ships carried two QF 2-pounder Mk II AA guns mounted on the aft end of their forecastle deck. The D-class destroyers had been intended to carry the new QF 0.5-inch (12.7 mm) Mk III machine gun in quadruple mountings on the bridge wings, but these were not initially available, so the old 2-pounder guns were retained in "Daring", "Diana", "Diamond" and "Defender". The 3-inch AA gun was removed in 1936–37, and the 2-pounders were relocated between the funnels on platforms The ships were fitted with two above-water quadruple mount for British 21-inch torpedo torpedoes.