QF 4 inch naval gun Mk IV, XII, XXII

The QF 4-inch gun Mk IV was introduced in 1911 as a faster-loading light gun successor to the BL 4 inch Mk VIII gun, and was the main gun on most Royal Navy and British Empire destroyers in World War I.

Country Name Origin Year
United Kingdom - UK (Great Britain) 1911
Country Name Operational Year Retirement Year
United Kingdom - UK (Great Britain) 1911 View

Type Light Naval gun
Submarine gun
Place of origin United Kingdom
Service history
In service 1911-1940s
Used by  United Kingdom
Wars World War I
World War II
Weight 2,750 pounds (1,250 kg) barrel & breech
Barrel length 160 inches (4.064 m) bore (40calibres)
Shell Mk IV : Separate QF 31 pounds (14.06 kg);
Mk XII & XXII : Fixed QF 31 pounds (14.06 kg), 35 pounds (15.88 kg) from 1944
Calibre 4-inch (101.6 mm)
Breech horizontal sliding block
Muzzle velocity Mk IV : 2,370 feet per second (720 m/s)
Mk XII & XXII : 1,873 feet per second (571 m/s)
Maximum firing range 10,000 yards (9,100 m)

End notes