The QF 2-pounder Mark XIV, or Rolls 2 pounder, was developed by Rolls-Royce as a competitor to the 40 mm "Vickers S" gun as an aircraft weapon. The latter was the more successful design, and found some use as an anti-tank weapon. A reworked version was adopted by the Royal Navy as a weapon for Motor Gun Boats, being adopted in the Fairmile C type. It had a semi-automatic horizontally sliding breech block, and was shipped on a manually trained pedestal mount. The weapon was not a success, and of the 1,200 ordered only some 600 were delivered. It was replaced by the Molins 6-pounder gun, the British Army's Ordnance QF 6 pounder gun (57 mm) with an auto-loader.
Read more about this topic: QF 2 Pounder Naval Gun
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