Sterling submachine gun
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|Sterling submachine gun|
Sterling L2A3 (Mark 4) submachine gun
|Place of origin||United Kingdom|
|Used by||See Users|
|Wars||World War II
Gulf War (final batch)
|Designer||George William Patchett|
|Manufacturer||Sterling Armaments Company|
|Weight||2.7 kilograms (6.0 lb)|
|Length||686 millimetres (27.0 in)
Folded stock: 481 millimetres (18.9 in)
|Barrel length||196 millimetres (7.7 in)|
7.62×51mm NATO (Battle Rifle variant)
|Action||Blowback and Lever-delayed blowback (Battle Rifle variant)|
|Rate of fire||550 round/min|
|Effective firing range||200 metres (220 yd)
Suppressed: 50–100 metres (55–109 yd)
|Feed system||34 round box magazine|
The Sterling submachine gun is a British submachine gun. It was trialled with the British Army in 1944–1945 as a replacement for the Sten, but it did not start to replace it until 1953. It remained in use until 1994, when it was phased out with the introduction of the L85A1 assault rifle.
In 1944, the British General Staff issued a specification for a new submachine gun. It stated that the weapon should not weigh more than six pounds (2.7 kg), should fire 9×19mm Parabellum ammunition, have a rate of fire of no more than 500 rounds per minute and be sufficiently accurate to allow five single shots to be fired into a one-foot-square target at 100 yd (91 m).
To meet the new requirement, George William Patchett, the chief designer at the Sterling Armaments Company of Dagenham, submitted a sample weapon of new design in early 1944. The army quickly recognised its potential (i.e. significantly increased accuracy and reliability when compared to the Sten) and ordered 120 examples for trials. Towards the end of the Second World War, some of these trial samples were used in combat by airborne troops at the battle of Arnhem and elsewhere, where it was known as the Patchett submachine gun. As the Patchett/Sterling can use straight Sten submachine gun magazines as well as the curved Sterling design, there were no interoperability problems.
After the war, with large numbers of Sten guns in the inventory, there was little interest in replacing them with a superior design. However, in 1947, a competitive trial between the Patchett, an Enfield design, a new BSA design and an experimental Australian design was held, with the Sten for comparison. The trial was inconclusive, but was followed by further development and more trials. Eventually, the Patchett design won and the decision was made in 1951 for the British Army to adopt it. It started to replace the Sten in 1953 as the "Sub-Machine Gun L2A1". Its last non-suppressed variation was the L2A3, but the model changes were minimal throughout its development life.
The Sterling submachine gun is constructed entirely of steel and plastic and has a shoulder stock, which folds underneath the weapon. Although of conventional blowback design firing from an open bolt, there are some unusual features: for example, the bolt has helical grooves cut into the surface to remove dirt and fouling from the inside of the receiver to increase reliability. The Sterling uses a much-improved (over the Sten) 34-round curved double-column feed box magazine, which is inserted into the left side of the receiver. The magazine follower, which pushes the cartridges into the feed port, is equipped with rollers to reduce friction and the firing pin is designed so that it does not line up with the primer in the cartridge until the cartridge has entered the chamber.
In what is known as advanced primer ignition, the Sterling uses a lighter bolt that is influenced by the explosion within the cartridge case. The cartridge is fired while the bolt is still moving forward with the breech block. This slows and stops the forward moving bolt and propels it to the rear to eject the spent case and increases the rate of fire.
The suppressed version of the Sterling (L34A1/Mk.5) was developed for covert operations. This version uses a ported barrel surrounded by a cylinder with expansion chambers to reduce the velocity of the bullet so that it doesn't break the sound barrier and thus cause a sonic boom, along with decreasing the muzzle blast and flash. This is so effective that the only sounds during firing are from the bolt reciprocating and the barely audible explosive discharge. The Australian and New Zealand SAS regiments used the suppressed version of the Sterling during the Vietnam War. It is notable for having been used by both Argentinian and British Special Forces during the Falklands War. A Sterling was used by Libyan agents to kill WPC Yvonne Fletcher outside the Libyan Embassy in London, which sparked the 1984 siege of the building.
The Sterling has a reputation for excellent reliability under adverse conditions and, even though it fires from an open bolt, good accuracy. With some practice, it was very accurate when fired in short bursts. While it has been reported that the weapon poses no problems for left-handed users to operate, it is not recommended without the wearing of ballistic eye protection. The path of the ejected cartridge cases is slightly down and backward, so mild burns can occasionally be incurred by left-handed shooters.
A bayonet of a similar design as that for the L1A1 SLR was produced and issued in British Army service, but was rarely employed except for ceremonial duties. Both bayonets were derived from the version issued with the Rifle No. 5 Mk I "Jungle Carbine", the main difference being a smaller ring on the SLR bayonet to fit the rifle's muzzle. When mounted, the Sterling bayonet was offset to the left of the weapon's vertical line, which gave a more natural balance when used for bayonet-fighting.
For a right-handed shooter, the correct position for the left hand while firing is on the ventilated barrel-casing, but not on the magazine, as the pressure from holding the magazine can increase the risk of stoppages, and a loose magazine can lead to dropping the weapon. The barrel-casing hold provides greater control of the weapon, so the right-hand can intermittently be used for other tasks. A semi-circular protrusion on the right hand side of the weapon, approximately two inches from the muzzle, serves to prevent the supporting hand from moving too far forward and over the muzzle.
The primary user complaint with the Sterling series is that there are projections in all directions, and carrying it on a sling frequently results in the weapon catching on clothing, load-bearing equipment, foliage, and doorways/hatches, as well as annoying (sometimes painful) poking of the user.
A total of over 400,000 were manufactured. Sterling built them for the British armed forces and for overseas sales, whilst the Royal Ordnance Factories at Fazakerley near Liverpool constructed them exclusively for the British military. ROF no longer makes full weapons, but still manufactures spare parts for certified end users.
A similar weapon, the Sub-Machine Gun Carbine 9 mm 1A1, is manufactured under license by the Indian Ordnance Factory at Kanpur, along with a Sub-Machine Gun Carbine 9 mm 2A1 which is a copy of the L34A1 integrally silenced version. At the beginning of the 21st century, these two weapons were still being manufactured by Ordnance Factories Board and used by the Indian Armed Forces.
- British Army
- Unassigned: Patchett Machine Carbine Mark 1 (trials commenced in 1944)
- Unassigned: Patchett Machine Carbine Mark 1 & Folding Bayonet (same as above but with folding bayonet, never accepted)
- L2A1: (Patchett Machine Carbine Mark 2) Adopted in 1953.
- L2A2: (Sterling Mark 3) Adopted in 1955.
- L2A3: (Sterling Mark 4) Adopted in 1956. Last regular version in service with the British Army.
- L34A1: Suppressed version (Sterling-Patchett Mark 5). Held in reserve by the British Army.
- Sterling Mark 6 "Police": a semi-automatic-only closed-bolt version for police forces and private sales. A US export version had a longer barrel (16 inches) to comply with Bureau of Alcohol, Tobacco, Firearms and Explosives (BATF) regulations. Beginning in 2009, Century Arms International (CAI) began marketing a similar semi-auto only carbine manufactured by Wiselite Arms. These too have a 16-inch barrel. They are assembled using a mix of newly made US parts, and parts from demilitarized Sterling Mark 4 parts kits. This is often marketed as the "Sterling Sporter".
- Sterling Mark 7 "Para-pistol": Special machine pistol variant issued to commando and plainclothes intelligence units. It had a shortened 4" / 108mm barrel, fixed vertical foregrip, and weighed 4.84 lb (2.20 kg). If used with a short 10- or 15-round magazine, it could be stowed in a special holster. It also could be used as a Close Quarters Battle weapon with the addition of an optional solid stock.
- Canadian Army
- C1 Submachine Gun: Adopted in 1958, replacing the STEN gun in general service. It is different from the British L2 in that it made extensive use of stamped metal rather the more expensive castings used by British production SMGs. It also had a removable trigger guard (for use with gloves in Arctic operations) as a standard option and used a new 30-round magazine. A 10-round magazine was also available for crews of armoured vehicles etc.
- Indian Army
- SAF Carbine 1A: Indian made Sterling L2A1.
- SAF Carbine 2A1: Sterling Mark V silenced carbine.
7.62 NATO variant
A variant of the Sterling submachine gun was manufactured in the 7.62×51mm NATO calibre. It used lever-delayed blowback to handle the more powerful rounds and was fed from 30 round Bren magazines. A bipod and detachable fixed stock could be added as well as a Single Point IR/Trilux nightsight. To prevent ammunition cookoff, the weapon fired from an open bolt. Acting as the Besal LMG of World War II, the 7.62 NATO calibre Sterling was intended as an emergency standby weapon in case of attack during the Cold War.
- Argentina: Mk 4 variant.
- Australia: "L34A1" suppressed variant. 
- Bahrain: Mk 4 variant.
- Bangladesh: Mk 4 variant.
- Belize: Mk 4 variant.
- Brunei: Mk 4 variant.
- Canada: Produced as the C1.
- India: Currently manufactured by the Indian Ordnance Factories. It is sold as the Sub Machine Gun Carbine 9 mm 1A1. A silenced version is also available which sold under the label of Sub Machine Gun Carbine 9 mm 2A1.
- Iraq: Mk 4 variant.
- Jamaica: Used by the Jamaica Defence Force as a personal defense weapon for auxiliary units.
- Libya: L34 variant.
- New Zealand
- Papua New Guinea
- Philippines: L34A1s used by Naval Special Warfare Group.
- Sierra Leone
- Singapore: Mk 4 variant used by Singapore Police Force's paramilitary units — Gurkha Contingent, Police Coast Guard and Police Special Operations Command; replaced by the Heckler & Koch MP5 since 1999.
- Spain: UOE special group of the Spanish Navy.
- Sri Lanka
- Trinidad and Tobago
- United Kingdom: L2A1 variant was accepted by the British Army in 1953. L34A1 variant entered service in 1966.
- List of submachine guns
- F1 submachine gun
- CETME C2 submachine gun
- Sten submachine gun
- Lanchester submachine gun
- Cobray Terminator
- E-11 blaster rifle
- Rinzler, JW. The Making of Star Wars (Enhanced Edition). New York: Random House LLC. pp. 636–637. ISBN 978-0-345-54286-1.
- Fowler, Will (2009). Royal Marine Commando 1950–82: From Korea to the Falklands. Osprey. pp. 17–20. ISBN 978-1-84603-372-8.
- Cutshaw, Charles Q. (28 February 2011). Tactical Small Arms of the 21st Century: A Complete Guide to Small Arms From Around the World. Iola, wisconsin: Gun Digest Books. pp. 17–20. ISBN 1-4402-2709-8.
- Firing the L34A1 on YouTube
- Lyles, Kevin (2004). Vietnam ANZACs: Australian & New Zealand troops in Vietnam 1962–72. Oxford: Osprey. ISBN 978-1-84176-702-4. p. 62
- Sterling 9mm MK4 SMG Sub Machine Gun on YouTube
- Kitsune (2001). "Sterling L2A3 Submachinegun". Retrieved 2009-05-23.
- "C1 Submachine Gun". Retrieved 2009-05-23.
- Jones, Richard D. Jane's Infantry Weapons 2009/2010. Jane's Information Group; 35 edition (January 27, 2009). ISBN 978-0-7106-2869-5.
- Horner, David (2002). SAS Phantoms of War: A History of the Australian Special Air Service. Allen & Unwin. ISBN 1-86508647-9.
- Miller, David (2001). The Illustrated Directory of 20th Century Guns. Salamander Books Ltd. ISBN 1-84065-245-4.
- "SUB MACHINE GUN CARBINE 9 mm 1A1". Retrieved 2009-05-23.
- "Sub Machine Gun Carbine 9 mm 2A1 (Silent Version)". Retrieved 2009-05-23.
- Gordon L. Rottman, Ron Volstad Armies of the Gulf War. ISBN 1-85532-277-3
- Leroy Thompson (20 September 2012). The Sten Gun. Osprey Publishing. pp. 74–. ISBN 978-1-78096-125-5.
- Ezell, Eward. Small Arms Today (Stackpole, 1988)
- "M3 Grease Guns Re-issued". 2005-02-22. Retrieved 2009-02-24.
- Diez, Octavio (2000). Armament and Technology. Lema Publications, S.L. ISBN 84-8463-013-7.
|Sterling submachine gun|
|L2A3 (Mark 4), stock collapsed|
|L2A3 (Mark 4), stock extended|
|L2A3 (Mark 4), partially disassembled|
- Sterling SMG – Official User's Manual
- Sterling 7.62x51mm NATO variant
- Chrome Plated L2A3 and 7.62 NATO variant
- Modern Firearms including several pictures of the various models.
- Photos of an early Patchett SMG, showing its strong resemblance to the Sterling
- Sterling L2 at SecurityArms
- Sub Machine Gun Carbine 9 mm 1A1, Sterling L2A3 machine carbine manufactured under license by Indian State Ordnance Factory Board.
- Sub Machine Gun Carbine 9 mm 2A1 (Silent Version), Sterling L34A1 silenced machine carbine manufactured under license by Indian State Ordnance Factory Board.
- Image of a MK7 (Para Pistol)
- Image of a FAMAE PAF (Chilean Manufactured)
- Video #1 of L2A3 being fired
- Video #2 of L2A3 being fired
- Video of Sterling Mk5 Silencer (L34A1) (Japanese)
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