It was subsequently fitted to a handful of destroyers operating in the North Sea for defence against motor torpedo and motor gunboats. It had a range of about 10km range and could fire up to eighteen 2.97kg shells per minute. The Quick-Firing (QF) 6-pounder 10 cwt (47 calibre) gun was a twin-barrelled weapon originally developed for coastal defence. Guns of this approximate calibre were seen as having a good balance between hitting power while being light enough to fit to small combatants or to larger ships without adding excessive top weight. There were two separate “6-pounders” designs of this size developed for naval use during the second world war. The RN has not had a 57mm gun in service since the 1950s. In the second of two articles examining these weapons, we look at the Bofors 57mm Mk3 gun. The Type 31 frigates will introduce two guns types new to Royal Navy service.
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