The L30 is a 120mm tank gun used by the British Army and Royal Army of Oman. It is fitted in the turret of the Challenger 2 main battle tank. It is an improved production model of the Royal Ordnance L11 series of rifled tank guns.

Class Vehicle
Type Self-Propelled artillery
Manufacturer Royal Ordnance Factory
Origin United Kingdom - UK (Great Britain)
Country Name Origin Year
United Kingdom - UK (Great Britain) 1989
Country Name Operational Year Retirement Year
Oman (Muscat) View
United Kingdom - UK (Great Britain) 1989 View
ManufacturerName Production From Production To Quantity
Royal Ordnance Factory View

The barrel is 55 calibres long (L55) and is made of electro-slag refined (ESR) steel. The bore and chamber are electro-plated with chromium to give a barrel life of 1500 effective full charges.

The breech mechanism is a split sliding-block breech. One vertically sliding block holds the obturation ring (which is necessary because the propellant charges are combustible cases or bags) and is locked for firing by a second block. When the second block falls, the first is released to open the breech.

Place of origin United Kingdom
Service history
In service 1989-
Used by UK, Oman
Production history
Designer Royal Ordnance Factory, Nottingham
Manufacturer Royal Ordnance Factories
Barrel length 55 calibres (6.6 meters)
Calibre 120 mm (4.7 in)

End notes