SA80 – the Most Accurate Assault Rifle

L85A1 rifle. Carrying handle and front sight instead of more common SUSAT sight

SA80 (Small Arms for 1980s) is the designation for a revolutionary family of assault weapons. On its introduction, the L85 Individual Weapon (IW) proved so accurate that the Army marksmanship tests had to be redesigned. The British Army uses the L85 Individual Weapon that replaced the rifle and sub-machine gun, and the L86 Light Support Weapon (LSW) that produces higher volumes of fire and is effective at longer ranges. An infantry section consists of two four-man fire teams armed with SA80s: three IWs and one LSW.

Both weapons have been modified in light of operational experience, and had a major mid-life update in 2002, which resulted in the SA80A2 series – the most reliable weapons of their type in the world.

One new Under slung Grenade Launcher (UGL), designed to be mounted beneath the barrel of the IW, will be issued to each fire team, replacing the Rifle Grenade General Service (RGGS) and 51mm mortar – significantly reducing the ammunition load the infantry section carries, while enhancing its capabilities. The UGL will be able to fire 40mm High Explosive (HE), smoke and illuminating rounds out to a range of 350 m to destroy, obscure or indicate enemy positions.

History

The rifle’s history dates back to the late 1940s, when an ambitious programme to develop a new cartridge and new class of rifle was launched in the United Kingdom based on combat experience drawn from World War II. Two 7 mm prototypes were built in a “bullpup” configuration, designated the EM-1 and EM-2. When NATO adopted the 7.62x51mm rifle cartridge as the standard caliber for its service rifles, further development of these rifles was discontinued (the British Army chose to adopt the 7.62 mm L1A1 SLR automatic rifle, which is a license-built version of the Belgian FN-FAL).

EM-1 prototype assault rifle

EM-2 assault rifle. Officially adopted (UK Army) but never put into service

In 1969 the Enfield factory began work on a brand new family of weapons, chambered in a newly designed British 4.85x49mm intermediate cartridge. The system was to be composed of two weapons: an individual weapon, the XL64E5 rifle and a light support weapon known as the XL65E4 light machine gun. Both designs were based on the 5.56 mm AR-18 assault rifle, which was manufactured in Britain by Sterling Armament Company.

Enfield SA80-IW. Designed for experimental 4.85×49 cartridge

In 1976 the prototypes were ready to be trialled, however after NATO’s decision to standardize ammunition among its members, Enfield engineers re-chambered the rifles to the American 5.56x45mm M193 cartridge. The newly redesigned 5.56 mm version of the XL64E5 became the XL70E3. The left-handed XL68 was also re-chambered in 5.56x45mm as the XL78. The 5.56mm Light Support Weapon variant, the XL73E3, developed from the XL65E4, was noted for the full length receiver extension with the bipod under the muzzle now indicative of the type. In this configuration both weapons underwent a series of evaluations, with a small batch of pre-production weapons being used by British soldiers during the Falklands conflict.

Further development out of the initial so-called “Phase A” pre-production prototypes led to the XL85 and XL86. While the XL85E1 and XL86E1 were ultimately adopted as the L85 and L86 respectively, a number of additional test models were produced. The XL85E2 and XL86E2 were designed to an alternate build standard with 12 components different from E1 variants, including parts of the gas system, bolt, and magazine catch. Three series of variants were created for “Environmental User Trials.” XL85E3 and XL86E3 variants were developed with 24 modified parts, most notably a plastic safety plunger. The E4′s had 21 modified parts, no modification to the pistol grip, and an aluminium safety plunger, unlike the E3 variants. Lastly, the E5 variants had 9 modified parts in addition to those from the E3/E4 variants.

After receiving feedback from users, addressing concerns and incorporating the several design changes noted, including adopting the rifle for use with the heavier Belgian SS109 version of the 5.56x45mm cartridge and improving reliability, the rifle was accepted into service with the British Army in 1985, designated the SA80 (Small Arms for the 1980s). The SA80 family consists of the L85A1 IW (Individual Weapon) and the L86A1 LSW (Light Support Weapon).

In 1994 production was officially completed. Over 350,000 L85A1 rifles and L86A1 light machine guns had been manufactured for the United Kingdom. They are also in use with the armed forces of Jamaica.

L85A1 assault rifle

Original SA80 weapons (both L85 and L86) were plagued with many problems, some being very serious. In general, L85 was quite unreliable and troublesome to handle and maintain, so, finally, in the year 1997, after years of constant complaints from the troops, it had been decided to upgrade most L85 rifles then in service.

The upgrade program, committed in years 2000-2002, was completed by the famousHeckler and Koch, which was then owned by British Royal Ordnance company (German investors bought the HK back in the 2002). About 200 000 rifles were upgraded into the L85A2 configuration, out of total 320 000 or so original L85A1 rifles produced. While official reports about the upgraded weapons were glowing, the initial field reports from the British troops, engaged in the Afghanistan campaign of 2002, were unsatisfactory. Most problems, however, were traced to improper care and maintenance of weapons, and for now the L82A2 performs fairy well both in Afghanistan and Iraq.

Other than the basic L85A1 variant, the SA80 IW also appeared in the shortened Carbine version, and in the manually operated L98A1 rifle, which got its gas system removed and a larger cocking handle attached. The L98A1 is used to train the army cadets for basic rifle handling and shooting skills, and the rifle is fired as a manually operated, straight pull magazine repeater rifle. The latest weapon in the SA80 family is the recently adopted L22 carbine, which is issued to tank crews of Royal Armoured Corps. This weapon is available in two versions, L82A1 and L82A2, the latter being fitted with additional Picatinny rail on the right side of front grip base.

L22A1 Carbine

The current L85A2 rifles are recognized as reliable and very accurate, especially when using standard issue SUSAT telescope sights. The drawbacks of the L85A2 are somewhat poor balance (which can be improved with installation of HK-made 40mm underbarrel grenade launcher), right-side only extraction and rearward placement of the fire mode selector.

L22A2 carbine

Description and Specifications

The L85 (SA80) is a gas operated, magazine fed, selective fire rifle of bullpup layout. The receiver of the L85 is made from stamped sheet steel, reinforced with welded and riveted machined steel inserts. The gas operated action has a short stroke gas piston, located above the barrel. The gas piston has its own return spring. Gas system has a three-positions gas regulator, one position for a normal firing, second for a firing in adverse conditions and the third for launching the rifle grenades (gas port is shut off). The machined bolt carrier rides inside the receiver on the two parallel steel guide rods, with the single return spring placed above and between the guide rods. The typical rotating bolt has 7 lugs that locks into the steel insert in the receiver, just behind the barrel breech. The charging handle is attached to the right side of the bolt carrier, and prior to A2 upgrade caused some problems by reflecting the ejected cases back into the action, thus causing stoppages. In the L85A2 configuration the charging handle was redesigned to avoid such problems. The charging handle slot is covered by the spring-loaded dust cover. The bolt and its extractor claw also were upgraded in the L85A2, to achieve more reliable extraction of the spent cases.

The trigger-hammer assembly of the L85A1 is also typical for a modern bullpup rifle, with the long link from the trigger to the hammer unit, located in the buttstock. The hammer assembly of the L85A2 was redesigned to introduce a slight delay before the hammer release when the gun is fired in the full auto. This did not affected the cyclic rate of fire but improved the reliability and stability of the weapon during the automatic fire. The fire mode selector is located at the left side of the receiver, well behind the magazine housing, and allows for single shots of full automatic modes of fire. The cross-bolt safety button is located above the trigger.

The barrel is rifled for a NATO-standard 5.56 mm ammunition, with 1:7 twist, and is fitted with a NATO-standard flash hider, which allows to launch the rifle grenades from the barrel.

The L85 is fed using NATO-standard (STANAG) magazines, similar to M16 type magazines, with the standard capacity of 30 rounds. Early L85A1 steel magazines caused a lot of troubles, as well as a magazine housing itself, which had a thin walls that could be easily dented, thus blocking the magazine way. Both magazines and its housings were upgraded in the L85A2 configuration.

The standard sighting equipment is the 4x SUSAT (Sight Unit, Small Arms, Trilux) telescope, with illuminated reticle. The SUSAT is mounted on a quick-detachable mount at the top of the receiver, and features an emergency backup open sights at tits top. The SUSAT allows for an accurate fire (mostly in single shots) out to 400-500 meters. For a second-line troops an alternative sighting system is available, that consists of the removable front post sight with high base and post protection “ears”, and a detachable carrying handle with built-in diopter rear sight.

The L85 can be fitted with the proprietary knife-type multipurpose bayonet. L85A2 rifles also can be fitted with 40mm under-barrel grenade launcher, using special handguard. Launcher is made in Germany by Heckler and Koch.

Caliber: .223 Rem / 5.56 mm
Cartridge: 5.56×45 mm NATO
Weight: 4.7 kg empty / 4.98 kg (with loaded magazine and optical sight)
Effective range: 400 m
In service: 1985 – present