QF 2-pounder naval gun

The 2-pounder gun, officially designated the QF 2-pounder (QF denoting "quick firing") and universally known as the pom-pom, was a 40-millimetre (1.6 in) British autocannon, used famously as an anti-aircraft gun by the Royal Navy. The name came from the sound that the original models make when firing. This QF 2-pounder was not the same gun as the Ordnance QF 2 pounder, used by the British Army as an anti-tank gun and a tank gun; they shared only the projectile weight of 2 pounds.

QF 2-pounder naval gun
Class Vehicle
Type Towed Artillery
Manufacturer Vickers-Armstrongs
Origin United Kingdom - UK (Great Britain)
Country Name Origin Year
United Kingdom - UK (Great Britain) 1915
Country Name Operational Year Retirement Year
Italy View
Japan View
Russia (USSR) View
United Kingdom - UK (Great Britain) 1915 1940 View
ManufacturerName Production From Production To Quantity
Vickers-Armstrongs View

Type Autocannon
Place of origin United Kingdom
Service history
In service 1915–1940s (Mk II)
1930–1940s (Mk VIII)
Used by British Empire
Japan
Russian Empire
Kingdom of Italy
Wars World War I
World War II
Production history
Designer Vickers Armstrongs
Designed 1915 (Mk II)
1923 (Mk VIII)
Variants Low-velocity (LV) & high-velocity (HV),
RHI, LHI, RHO, LHO for multiple mountings,
Type 91 HI Shiki (Japanese)
Specifications (Mk.VIII HV)
Weight 850 lb (390 kg)
Length 8 ft 6 in (2.59 m)
Shell 40 × 158R
Calibre 40-millimetre (1.6 in)
Barrels 1, 4 or 8
Rate of fire 115 rpm
Muzzle velocity new gun: 732 m/s (2,400 ft/s)
worn gun: 701 m/s (2,300 ft/s)
Effective firing range 3,960 m (13,300 ft) A/A ceiling
Maximum firing range 6,220 m (6,800 yd) at 701 m/s (2,300 ft/s)
Feed system 14-round steel-link belt
Filling weight 71 g (2.5 oz)

End notes