Accuracy International AWM

Accuracy International AWM

British Armed Forces AWM 338, designated L115A3
Type Sniper rifle
Place of origin United Kingdom
Service history
In service 1996–present
Used by See Users
Wars Afghanistan War, Iraq War
Production history
Manufacturer Accuracy International
Specifications
Weight 6.5 kg (14.3 lb) (.300 Winchester Magnum)
6.9 kg (15.1 lb) (.338 Lapua Magnum)
with stock, bipod and empty magazine
Length 1200 mm (47.2 in) (.300 Win. Mag.)
1230 mm (48.4 in) (.338 Lapua Magnum)
Barrel length 660 mm (26 in) (.300 Win. Mag.)
686 mm (27 in) (.338 Lapua Magnum)
Cartridge .300 Winchester Magnum
.338 Lapua Magnum
Action Bolt-action
Effective firing range 1,100 m (1,203 yd) (.300 Winchester Magnum)
1,500 m (1,640 yd) (.338 Lapua Magnum)
Note that the Longest recorded sniper kill @ 2,470 m (2,701 yd) used a L115A3
Feed system 5-round detachable box magazine
Sights detachable aperture type iron sights
day or night optics

The Accuracy International AWM (Arctic Warfare Magnum) is a bolt-action sniper rifle manufactured by Accuracy International designed for magnum rifle cartridge chamberings. The Accuracy International AWM is also unofficially known as the AWSM (Arctic Warfare Super Magnum), which typically denotes AWM rifles chambered in .338 Lapua Magnum.

On 25 September 2012 Accuracy International announced on their company website that the AWM .338 Lapua Magnum rifle is being phased out and replaced by the Accuracy International AX338 rifle.[1]

Arctic Warfare Magnum system

The Accuracy International AWM rifle is a variant of the British Accuracy International Arctic Warfare (AW) rifle that was the basis of a family of sniper rifles using the Arctic Warfare name. As such the design details of the AWM variant are similar to the ones found in the basic AW rifle system. Compared to the AW, the AWM has a longer bolt to accommodate dimensionally larger magnum-length cartridges such as the .300 Winchester Magnum and the .338 Lapua Magnum. The bolt head, locking ring, and extractor and magazines were also revised to work with the increased size and operating pressures of magnum rifle cartridges.

The AWM features a detachable single stack removable box magazine which holds five rounds. The normal cartridges for this rifle, and the ones which have been accepted by NATO for use in AWM rifles, are .300 Winchester Magnum and .338 Lapua Magnum.

Muzzle brakes are fitted to reduce recoil, jump and flash and act as a base for optional iron sights and suppressors.

Normally, the AWMs are outfitted with a Schmidt & Bender PM II 10×42/MILITARY MK II 10×42 telescopic sight with 10× fixed power of magnification. However, a Schmidt & Bender PM II/MILITARY MK II with variable magnification of either 3–12×50, 4–16×50 or 5–25×56 can be used if the operator wants more flexibility to shoot at varying ranges, or when a wide field of view is required. Accuracy International actively promotes fitting the German made Schmidt & Bender PM II/MILITARY MK II product line as sighting components on their rifles, which is rare for a rifle manufacturer. The German and Russian Army preferred a telescopic sight made by Zeiss[2] over Accuracy International's preference.

The AWM rifle is normally supplied in a metal transit case together with a telescopic sight, mount, butt spacers, bipod, spare magazines, sling, cleaning and tool kits.

Magnum chamberings

.300 Winchester Magnum

The .300 Winchester Magnum (7.62×67mm) cartridge was designed as a magnum hunting cartridge and offers a flatter trajectory and a significant increase in muzzle velocity, wind resistance and supersonic range over the dimensionally smaller 7.62×51mm NATO cartridge. The ability of the .300 Winchester Magnum chambering to obtain fairly high muzzle velocities combined with their diameter or caliber relatively heavy and long very-low-drag bullets significantly enhance the hit probability at longer ranges and hence the effective range compared to the 7.62×51mm NATO cartridge. For precision shooting, the Federal Gold Medal Match grade is the most commonly used ammunition.

The AWM chambered for the .300 Winchester Magnum is fitted with a fluted, stainless steel barrel that is 660 mm (26") long for optimum muzzle velocity and nominal weight. The .300 Winchester Magnum barrel features a non-traditional 279.4 mm (1:11 in) right-hand twist rate.

.338 Lapua Magnum

A Dutch ISAF sniper team displaying their Accuracy International AWM .338 Lapua Magnum rifle and Leica/Vectronix VECTOR IV laser rangefinder binoculars.
A British sniper (center) carrying his L115A3 Long Range Rifle with attached suppressor.

The AWM in the .338 Lapua Magnum (8.6×70mm) calibre was designed as a dedicated long range sniper rifle combining the maneuverability of rifles chambered in 7.62×51mm NATO with the greater power and range of the .50 BMG cartridge.

Compared to most .50 calibre rifles, the AWM offers considerably less rifle weight, recoil, muzzle flash, smoke and report. Although the .338 Lapua Magnum delivers less kinetic energy to the target compared with the .50 BMG, both cartridges have similar trajectories, resistance to wind drift and penetration, while the .338 Lapua Magnum unquestionably outperforms the 7.62×51mm NATO and .300 Winchester Magnum, especially at ranges beyond 800 metres (875 yd) and 1,100 metres (1,203 yd). AWM rifles in .338 Lapua Magnum can also be deployed against unarmoured hard targets, including armoured glass.

The AWM .338 Lapua Magnum is fitted with a stainless steel, fluted, 686 mm (27") barrel, which research has found to be the best compromise between muzzle velocity on the one hand, and weight and length on the other. The rifle's barrel has an unconventional 279 mm (1:11 in) right-hand twist rate, optimized for firing .338-calibre very-low-drag bullets up to 16.85 g (260 gr). When the AWM .338 Lapua Magnum was developed military issue cartridges were loaded with 16.2 g (250 gr) very-low-drag bullets. Longer, heavier very-low-drag bullets like the Sierra HPBT MatchKing .338-calibre 19.44 g (300 gr) and the 21st century 19.44 gram (300 grain) .338-calibre HPBT Scenar can be used, but require a 254 mm (1:10 in) twist rate to stabilize them under high air density conditions as found on arctic coasts.[3]

A limitation of AWM rifles is that .338 Lapua Magnum cartridges loaded to the Commission Internationale Permanente pour l'Epreuve des Armes à Feu Portatives (C.I.P.) maximum allowed overall length of 93.50 mm (3.681 in) do not fit in the magazine due to a lack of internal magazine length. The reason for this limitation is that the AWM bolt action was initially developed for dimensionally smaller cartridges and then modified for the .338 Lapua Magnum chambering.[4] Ammunition manufacturers produce .338 Lapua Magnum military issue cartridges loaded with 16.2 g (250 gr) very-low-drag bullets (overall length ≤ 91.44 mm / 3.600 in) that fit in the 91.50 mm (3.602 in) long AWM magazines. As long as .338 Lapua Magnum cartridges that fit in the magazines are used, the AWM rifles can be used as repeating rifles instead of single shot rifles.

To address .338 Lapua Magnum ammunition length limitations of the AWM Accuracy International has since developed the AX338 long range rifle as the AWM successor model. Compared to the AWM, the bolt action of the AX338 is longer and wider and the internal magazine is lengthened, allowing the unimpaired use of .338 Lapua Magnum cartridges loaded to the C.I.P. (Permanent International Commission for the Proof of Firearms Portable) maximum allowed overall length of 93.50 mm (3.681 in). Further the AX338 has a 238 mm (1:9.375 in) twist rate to adequately stabilize longer, heavier .338 caliber very-low-drag projectile designs that became more common in the 21st century.[5][6]

Ammunition types currently available for the .338 Lapua Magnum are FMJ, hollow point, Armor Piercing (AP) and Armor Piercing Incendiary (API).

Longest confirmed sniper kill

In November 2009, British Army sniper Corporal of Horse (CoH) Craig Harrison, a member of the Household Cavalry, set the current record for longest recorded sniper kill by killing two Taliban machine gunners consecutively south of Musa Qala in Helmand Province in Afghanistan at a range of 2,475 m (2,707 yd) using a L115A3 Long Range Rifle.[7][8][9][10] In the reports CoH Harrison mentions the environmental conditions were perfect for long range shooting: no wind, mild weather, clear visibility.[11]

Ballistics and use of environment and equipment to achieve the aiming solution

Schmidt & Bender 5-25×56 PM II LP telescopic sight, similar to the sight used by Harrison, and its adjustment controls
Seen at 5× zoom
Seen at 25× zoom
The P4 stadiametric rangefinding reticle as used in the Schmidt & Bender 5-25×56 telescopic sight. The small red figure in the images is the silhouette of a man standing at a range of 2,475 m (2,707 yd).

According to JBM Ballistics,[12] using drag coefficients (Cd) provided by Lapua, the L115A3 has an approximate supersonic range (speed of sound = 340.3 m/s) of 1,375 m (1,504 yd) under International Standard Atmosphere conditions at sea level (air density ρ = 1.225 kg/m3) and 1,548 m (1,693 yd) at the 1,043 m (3,422 ft) altitude or elevation (air density ρ = 1.1069 kg/m3) of Musa Qala. This illustrates how differences in environmental conditions can significantly affect bullet flight.

The Schmidt & Bender MILITARY MKII 5-25×56 0.1 MIL RAD parallax, illumination, double turn telescopic sight used by Harrison on the L115A3 Long Range Rifle can be adjusted in 0.1 milliradian or mil increments (at a distance of 2,475 m (2,707 yd) 1 adjustment increment of 0.1 milliradian equates to a 24.75 cm (9.74 in) point of impact shift) and has a maximal vertical elevation range of 26 milliradian. To increase the maximal elevation range Accuracy International produces mounts for telescopic sights with a 13.09 mil (45 MOA) built in vertical cant designed for their .338 Lapua Magnum rifles fitted with the 5-25×56 telescopic sight. Even with a 13.09 mil canted mount the employed sighting system is not able to dial in over 39.09 milliradian of vertical aiming correction, which is significantly less than Harrison required during his record shot.[13][14]

The external ballistics software program by JBM Ballistics predicts that the bullets of British high pressure .338 Lapua Magnum cartridges using 16.2 g (250 gr) Lapua LockBase B408 bullets fired at 936 m/s (3,071 ft/s) muzzle velocity under International Standard Atmosphere conditions at 1,043 m (3,422 ft) elevation (air density ρ = 1.1069 kg/m3) and assuming a flat fire scenario (a situation where the shooting and target positions are at equal elevation) and a 100 m (109 yd) zero (the distance at which the rifle is sighted in) arrive at 2,475 m (2,707 yd) distance after approximately 6.017 seconds flight time at 251.8 m/s (826 ft/s) velocity and have dropped 120.95 m (396.8 ft) or in angular units 48.9 milliradian (168 MOA) on their way. Harrison had to use the P4 reticle offering 0.5 mil spaced holdover hash marks in his 5-25×56 telescopic sight to compensate for the lack of vertical aiming correction and thus achieve the required aiming solution. The long horizontal line at 5× zoom or magnification represent 49.09 milliradian (168.6 MOA) or slightly over the required assumed vertical elevation.[15]

Users

Armed forces

British Armed Forces

Royal Marines with L115A1 rifles.
The L115A3 Long Range Rifle.

The British Armed Forces adopted the AWM rifle chambered in .338 Lapua Magnum as the L115A1 Long Range Rifle. The British L115A1 rifles are outfitted with Schmidt & Bender 3-12×50 PM II/MILITARY MKII 3-12×50 0.1 MIL RAD telescopic sights. The L115A1 is in service with the Royal Marines, British Army and RAF Regiment in Afghanistan and Iraq.

In November 2007 the British Ministry of Defence (MOD) announced that their snipers in the Army, Royal Marines and RAF Regiment were to get a new rifle. Accuracy International would supply 580 L115A3 Long Range Rifles with day telescopic sights. The L115A3 is being supplied as part of a broader Sniper System Improvement Programme (SSIP) program which also includes night sights, spotting scopes, laser range finders and tripods.[35] The L115A3 rifle was first deployed to Afghanistan in May 2008.[33] Some features of the improved L115A3 include:

The MOD claims a muzzle velocity of 936 m/s (3,071 ft/s) for the L115A3.[36]

Dutch Armed Forces

The AWM-F commonly referred to as Geweer Lange Afstand (GLA) (Long Range Rifle) chambered in .338 Lapua Magnum has been introduced from 1996 by the Dutch Army’s Korps Commandotroepen snipers and the AWM is used by all Schutter Lange Afstand (SLA) (Long Range Marksmen) of the 11 Luchtmobiele Brigade (airborne infantry), 13 Gemotoriseerde Brigade (motorised infantry), 43 Gemechaniseerde Brigade (Mechanised infantry). Recently (2007) the snipers of the Netherlands Marine Corps also received this sniper rifle. The Dutch AWM(-F) rifles are outfitted with Schmidt & Bender 10×42 PM II and 3-12×50 PM II telescopic sights. The rifles are designated as Accuracy, antipersoneel snipergeweer .338 (Accuracy anti personnel sniper rifle .338) and the Military of the Netherlands claim a maximum effective range of 1,400 m (1,531 yd) for their AWM(-F) rifles and have used these rifles in Afghanistan with great success.[25][26]

German Armed Forces

AWM-F or G22 in Bundeswehr nomenclature with attached suppressor.
Zeiss 3–12×56 SSG reticle.

Since 1998 the Bundeswehr fields an AWM-F chambered in .300 Winchester Magnum (7.62 × 67 mm in Bundeswehr nomenclature), with a 3–12×56 SSG telescopic sight made by the German company Zeiss, under the designation of G22 (for Gewehr 22) or Scharfschützengewehr 22 (sniper rifle 22). The German G22 rifles have folding stocks and emergency iron sights. For their G22 rifles the Bundeswehr claims an effective range of 1,100 m (1,203 yd).[19][20]

The German ammunition manufacturer Metallwerk Elisenhütte Nassau (MEN) has specially developed 7.62 × 67 mm ammunition for the G22.[37]

The Carl Zeiss Optronics (previously branded as Hensoldt) telescopic sight has a mil-dot reticle and a scale that enables the operator to see the dialled in elevation setting through the rifle scopes ocular. The Bundeswehr 3–12×56 SSG telescopic sight differs somewhat from the further developed 3–12×56 SSG-P telescopic sight. The Bundeswehr telescopic sight has no parallax setting option and the range scale has a setting range from 0 to 10 instead of 0 to 11 symbolizing the 11.2 milliradian elevation adjustment range shown in the current Carl Zeiss Optronics 3–12×56 SSG-P telescopic sight brochure.[38]

Royal Malaysia Police

The Unit Tindakhas (UTK) of the Pasukan Gerakan Khas (PGK) snipers from Royal Malaysia Police using the AWSM, chambered in .338 Lapua Magnum alongside the 7.62mm Accuracy International Arctic Warfare.[24]

Norwegian Special Forces

The snipers in Marinejegerkommandoen and Forsvarets Spesialkommando are currently using the AWM primary weapon .338 Lapua Magnum, with Schmidt & Bender scopes.

Russian Alpha Group

Accuracy International rifles related

AI Arctic Warfare
AI AWP ('Police')
AI AWM ('Magnum')
AI AW50 ('.50 BMG')
AI AS50
Australian AW50F
Swedish Psg 90

The snipers of the Russian Alpha Group counter-terrorism unit are using the AWM-F chambered in .338 Lapua Magnum with Zeiss 3–12×56 SSG series telescopic sights.[29][30]

Singapore Army

The snipers of the Singapore Army use the AWM alongside the Accuracy International Arctic Warfare.

South Korean Special Forces

The 707th Special Mission BN from ROK Army and the Republic of Korea Naval Special Warfare Brigade from ROK Navy use AWM series sniper rifles chambered in .338 Lapua Magnum outfitted with Schmidt & Bender 3-12×50 PM II telescopic sights. It has some telescopic sight attachment problems.[39]

References

  1. ↑ Accuracy International website news section AW338 rifles fazed out and replaced by AX338 rifles
  2. ↑ "Zeiss: Telescopic sights for handheld weapons". Retrieved 26 October 2014.
  3. ↑ Lapua 19.44 g (300 gr) HPBT Scenar Bullet brochure
  4. ↑ The New AX rifle shown at the Shot Show 2010, Las Vegas
  5. ↑ AX338 .338 long range rifle
  6. ↑ How it works magazine article AX338 PSR sniper rifle
  7. ↑ "Hotshot sniper in one-and-a-half mile double kill – The Sunday Times 2-5-2010". Retrieved 26 October 2014.
  8. ↑ "Sniper's Taliban Shots Earn Him Place In Military Record Books –". Daily Star. 2 May 2010.
  9. ↑ "Sniper kills Qaeda-from 1½ mi. away – New York Post 2-5-2010". New York Post. 2 May 2010. Retrieved 26 October 2014.
  10. ↑ "Super Sniper's World Record Kill". The Sun.
  11. ↑ "Super Sniper Kills Taliban 1.5 Miles Away" 3 May 2010 Sky News
  12. ↑ JBM Ballistics freeware online ballistic calculator
  13. ↑ Schmidt & Bender 5-25x56 PM II/LP/MTC/LT Dimensions, Technical Data, Click Value, Reticles, 1st focal plane Reticles, 2nd focal plane Reticles
  14. ↑ Accuracy International rifle accessories brochure
  15. ↑ Diagram and measurements of the employed elements in the Schmidt & Bender P4F stadiametric reticle
  16. ↑ "Armenian Army Sniper Rifles". YouTube. Retrieved 26 October 2014.
  17. ↑ "Azerbaijan reacts to French and British arms sales to Armenia". APA. 1 February 2016.
  18. ↑
  19. 1 2 "G22 page at the Bundeswehr website (German)". Retrieved 26 October 2014.
  20. 1 2 "Datasheet on the G22 (German)" (PDF). Retrieved 26 October 2014.
  21. ↑ "Kopassus & Kopaska – Specijalne Postrojbe Republike Indonezije". Hrvatski vojnik (in Croatian). Retrieved 2010-06-12.
  22. ↑ http://www.isayeret.com/guides/weapons.shtml
  23. ↑ Accuracy International AWM – colmoschin.it
  24. 1 2 "PGK Malaysian Special Police Force Weapons". Military Factory. March 07, 2016. Retrieved March 11, 2016. Check date values in: |date= (help)
  25. 1 2 "Special Forces – Wapens" (in Dutch). Netherlands Legermuseum: Collectie Informatie Centrum. Retrieved 2009-10-17.
  26. 1 2 "Accuracy, antipersoneel snipergeweer .338" (in Dutch). Netherlands Ministry of Defence. Retrieved 2010-02-24.
  27. ↑ "Nowe gromy GROM". Retrieved 26 October 2014.
  28. ↑ "Snipers foto". Retrieved 26 October 2014.
  29. 1 2 http://cripo.com.ua/?sect_id=3&aid=90616(Russian)
  30. 1 2 http://slavs.org.ua/sorevnovanie-sniperov(Russian)
  31. ↑ https://m.youtube.com/watch?v=bna78e-h3RI&feature=youtu.be
  32. ↑ Writer, Staff (2016-02-20). "Russian SPETSNAZ Weapons". Military Factory. Retrieved 2016-02-20.
  33. 1 2 L115A3 Long Range Rifle. British Army.
  34. ↑ "Future Weapons - Magnum sniper". YouTube. Retrieved 26 October 2014.
  35. ↑ Snipers to get new longer range rifles
  36. ↑ L96 Sniper Rifle and L115A3 Long Range Rifle
  37. ↑ "Metallwerk Elisenhütte Nassau (MEN) company website". Retrieved 26 October 2014.
  38. ↑ Carl Zeiss Optronics 3-12x56 SSG-P telescopic sight brochure
  39. ↑ 특전사 대테러부대 장거리 저격총 엉망 2012-01-25

External links

Wikimedia Commons has media related to G 22.
Records
Preceded by
McMillan Tac-50		 Longest confirmed combat sniper-shot kill
2009
2,475 m (2,707 yd / 1.538 mi)
using 16.2 g (250 gr) Lapua LockBase B408 bullets by Craig Harrison 		Succeeded by
current
This article is issued from Wikipedia - version of the Saturday, April 16, 2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.