Heavy Artillery
Ordnance QF 4.5in Gun Mk I, under development to fire a 55lb shell over 21,000 yards. Entered service in 1937 with the Australian and Canadian armies. Weight in action is 12,880lbs, 55lb shell weight of which 3.875lbs is HE filling. Maximum range is 21,500 yards and the carriage has 60 degrees of traverse and 30 degrees of elevation. Shell types are HE, concrete-piercing, smoke and illumination.
BL 6in Mk 9 on Mk 8 or 8A Carriages, another First World War vintage gun mounted on a new carriage. This gun fires a 100lb shell over 18,750 yards and weight in action is 22,792lbs. Traverse is 8 degrees.
BL 6in 26cwt Howitzer Mk 1, this First World War era piece is being used until units re-equip with the QF 4.5in Gun Mk I.
BL 7.2in Howitzer No.1 Mk I, entered service in 1937 with a four-wheeled carriage for stability. Weight in action is 29,100lbs; traverse is 60 degrees, elevation -2 to +65 degrees, weight of shell 200lbs, range of 19,680 yards. Shell types are HE, concrete-piercing, smoke and illumination.