The Royal Ordnance L11A5, officially designated Gun, 120 mm, Tank L11, [i] is a 120 mm L/55 rifled tank gun design. It was the second 120 mm calibre tank gun in service with British Army. It was the first of NATO's 120 mm main battle tank guns which became the standard calibre for Western tanks in the later period of the Cold War. A total of ...

The L number in isolation is not a unique identifier; the L1 designation alone is used for a rifle and its corresponding bayonet and blank-firing attachment, a machine gun, a tank gun, a sighting telescope, an anti-riot grenade, three separate rocket systems, a necklace demolition charge, a hand-thrown flare, a fuze setter head, and two ...

The gun was fully stabilised with a fully computerized integrated control system. The secondary armament consisted of a coaxial L8A1 7.62 mm machine gun and another 7.62 mm machine gun mounted on the commander's cupola. [19]

In British Army service, the 120 mm L11 tank gun installed in the Challenger 1 and Chieftain was to have been replaced by the L30. These plans were abandoned some years ago and the Chieftain MBT was finally phased out of service with the British Army early in 1996.

The L number alone is not a unique identifier, for instance there is an L11 automatic pistol, machine gun and tank gun. Rather, it is used in conjunction with a weapon description e.g. " Rifle, 7.62mm, L1A1 ".

Close-up of the 120mm L11A5 rifled gun on a Chieftain main battle tank. Source: Simon Q - © GNU Attribution Share Alike license Origin

Based on the standard L118, these saluting guns are modified to exclusively fire blank cartridges, are not fitted with the APS system and are easily distinguished from the field gun variant by their distinctive bronze green paintwork, chromed muzzle brake, and chromed breech.

The hydropneumatic retraction method and thermal sleeve used in the L11 can be said to be the beginning of 120mm tank guns, as they were used not only in the later developed German Rheinmetall RH120 smoothbore gun, but also in the design …

The Royal Ordnance L11A5, officially designated Gun 120 mm Tk L11,[lower-roman 1] is a 120 mm L/55 rifled tank gun design. It was the first of NATO's 120mm Main Battle Tank guns which became the standard calibre for Western tanks in the later period of the Cold War.

The L1A1 HMG is a .50 (12.7mm) caliber heavy machine gun. The HMG is a modernised version of the American-made Browning M2, which served with distinction during World War 2. The belt-fed HMG fires at a rate of 485-635 rounds-per-minute to a range up to 2000 meters.