From Wikipedia, the free encyclopedia
and law enforcement
terminology, a sniper rifle
is a precision-rifle
used to ensure more accurate placement of bullets at longer ranges than other small arms
. A typical sniper rifle is built for optimal levels ofaccuracy
, fitted with a telescopic sight
and chambered for a military centerfire cartridge
. The term is often used in the media to describe any type ofaccurized
firearm fitted with a telescopic sight that is employed against human targets, although “sniping rifle” or “sniper’s rifle” is the technically correct fashion to refer to such a rifle. The 7.62x51mm M40, United States Marine Corps standard-issue sniper rifle. The M-40A3 is the new precision fire weapon used by Marine snipers. Photo by: Gunnery Sgt Matt Hevezi
The military role of sniper
(a term derived from thesnipe
, a bird which was difficult to hunt and shoot) dates back to the turn of the 18th century, but the true sniper rifle is a much more recent development. Advances in technology, specifically that of telescopic sights
and more accurate manufacturing, allowed armies to equip specially trained soldiers with rifles that enable them to deliver precise shots over greater distances than regular infantry
weapons. The rifle itself could be based on a standard rifle (at first, a bolt-action
rifle); however, when fitted with a telescopic sight, it becomes a sniper rifle.
n the American Civil War Confederate troops equipped with barrel-length three power scopes mounted on the exceptionally accurate BritishWhitworth rifle had been known to kill Union officers at ranges of about 800 yards (731.5m), an unheard-of distance at that time.
The earliest sniper rifles were little more than conventional military or target rifles with long-range “peep sights” and Galilean ‘open telescope’ front and rear sights, designed for use on the target range. Only from the beginning of World War I
did specially adapted sniper rifles come to the fore. Germany deployed military caliber hunting rifles with telescopic sights, and the British used Aldis, Winchester and Periscopic Prism Co. sights fitted by gunsmiths to regulation SMLE
Mk III and Mk III* or Enfield Pattern 1914
rifles; the Canadian Ross rifle
was also employed by snipers after it had been withdrawn from general issue.
Bor – the 7.62×51 mm Polish bolt-action sniper rifle.
Typical World War II
-era sniper rifles were generally standard-issue battle rifles, selected for accuracy, with a 2.5x or 3x telescopic sight and cheek-rest fitted and the bolt turned down if necessary to allow operation with the scope fitted. Australia’s No.1 Mk III* (HT) rifle was a later conversion of the SMLE fitted with the Lithgow heavy target barrel at the end of WW2. By the end of the war, forces on all sides had specially trained soldiers equipped with sniper rifles, and they have played an increasingly important role in military operations ever since.
Sniper rifles aimed at military service are often designed for very high durability, range, reliability, sturdiness, serviceability and repairability under adverse environmental and combat conditions, at the sacrifice of a small degree of accuracy. Military snipers and sharpshooters may also be required to carry their rifles and other equipment for long distances, making it important to minimize weight. Military organizations often operate under strict budget constraints, which influences the type and quality of sniper rifles they purchase. Special Reaction Team (SRT) members US Marine Corps (USMC) Sergeant Shannon C. Moye (foreground), sites through the scope on his 7.62mm M-86 sniper rifle as Corporal Eddie L. Tesch, uses a spotting scope to read targets taken out during sniper. (Released to Public)
Sniper rifles built or modified for use in law enforcement are generally required to have the greatest possible accuracy, more than military rifles, but do not need to have as long a range. As law enforcement-specific rifles are usually used in non-combat (often urban) environments, they do not have the requirement to be as hardy or portable as military versions; nevertheless they may be smaller, as they do not need very long range. Some of the first sniper rifles designed specifically to meet police and other law-enforcement requirements were developed for West German police after the Munich massacre at the 1972 Summer Olympics. Many police services and law enforcement organizations (such as the U.S. Secret Service) now use rifles designed for law enforcement purposes. The Heckler & Koch PSG1 is one rifle specifically designed to meet these criteria and is often referred to as an ideal example of this type of sniper rifle. The FN Special Police Rifle was built for and is marketed to law enforcement rather than military agencies.
The features of a sniper rifle can vary widely depending on the specific tasks it is intended to perform. Features that may distinguish a sniper rifle from other weapons are the presence of a telescopic sight, unusually long overall length, a stock designed for firing from a prone position, and the presence of abipod and other accessories.
The single most important characteristic that sets a sniper rifle apart from other military or police small arms is the mounting of a telescopic sight, which is relatively easy to distinguish from smaller optical aiming devices found on some modern assault riflesand submachine guns. This also allows the user to see farther. The telescopic sights used on sniper rifles differ from other optical sights in that they offer much greater magnification (more than 4x and up to 40x), and have a much larger objective lens (40 to 50 mm in diameter) for a brighter image. Most telescopic lenses employed in military or police roles have special reticles to aid with judgment of distance, which is an important factor in accurate shot placement due to the bullet’s trajectory.
PSO-1 Sniper Scope Reticle
1 – Lead/deflection scale
2 – Main targeting chevron
3 – Bullet drop chevrons
4 – Rangefinder
The choice between bolt-action and semi-automatic(more commonly known as recoil or gas operation) is usually determined by specific requirements of the sniper’s role as envisioned in a particular organization, with each design having advantages and disadvantages. For a given cartridge, a bolt-action rifle is cheaper to build and maintain, more reliable, and lighter, due to fewer moving parts in the mechanism. In addition, the lack of an external magazine allows for more versatile fire-positioning, and the absence of uncontrolled automatic cartridge case ejection helped to avoid revealing the firer’s position. Semi-automatic weapons can serve both as battle rifle and sniper rifle, and allow for a greater rate (and hence volume) of fire. As such rifles may be modified service rifles, an additional benefit can be commonality of operation with the issued infantry rifle. A bolt action is most commonly used in both military and police roles due to its higher accuracy and ease of maintenance. Anti-materiel applications such as mine clearing and special forces operations tend to use semi-automatics.
A Marine manually extracts an empty cartridge and chambers a new 7.62x51mm round in his bolt-action M40A3 sniper rifle. The bolt handle is held in the shooter’s hand and is not visible in this photo.
A designated marksman
rifle (DMR) is less specialized than a typical military sniper rifle, often only intended to extend the range of a group of soldiers. Therefore, when a semi-automatic action is used it is due to its ability to cross over into roles similar to the roles of standard issue weapons. There may also be additional logistical
advantages if the DMR uses the same ammunition as the more common standard issue weapons. These rifles enable a higher volume of fire, but sacrifice some long range accuracy. They are frequently built from existingselective fire battle rifles
or assault rifles, often simply by adding a telescopic sight and adjustable stock.
A police semi-automatic sniper rifle may be used in situations that require a single sniper to engage multiple targets in quick succession, and military semi-automatics such as the M110 SASS
are used in similar “target-rich” environments.
In a military setting, logistical concerns are the primary determinant of the cartridge used, so sniper rifles are usually limited to rifle cartridges commonly used by the military force employing the rifle and match grade ammunition. Since large national militaries generally change slowly, military rifle ammunition is frequently battle-tested and well-studied by ammunition and firearms experts. Consequently, police forces tend to follow military practices in choosing a sniper rifle cartridge instead of trying to break new ground with less-perfected (but possibly better) ammunition. Before the introduction of the standard 7.62x51mm NATO cartridge in the 1950s, standard military cartridges were the .30-06 Springfield or 7.62x63mm (United States), .303 British(7.7x56mmR) (United Kingdom) and 7.92x57mm (8mm Mauser) (Germany). The .30-06 Springfield continued in service with U.S. Marine Corps snipers during the Vietnam War in the 1970s, well after general adoption of the 7.62x51mm. At the present time, in both the Western world and within NATO, 7.62x51mm is currently the primary cartridge of choice for military and police sniper rifles. Worldwide, the trend is similar. The preferred sniper cartridge in Russia is another .30 calibre military cartridge, the 7.62 x 54 mm R, which has similar performance to the 7.62x51mm. This cartridge was introduced in 1891, and both Russian sniper rifles of the modern era, the Mosin-Nagant and the Dragunov sniper rifle, are chambered for it. Certain commercial cartridges designed with only performance in mind, without the logistical constraints of most armies, have also gained popularity in the 1990s. These include the 7 mm Remington Magnum (7.2x64mm), .300 Winchester Magnum (7.8/7.62x67mm), and the .338 Lapua Magnum (8.6x70mm). These cartridges offer better ballistic performance and greater effective range than the 7.62x51mm. Though they are not as powerful as .50 calibre cartridges they are not as heavy as rifles chambered for .50 calibre ammunition, and are significantly more powerful than rifles chambered for 7.62x51mm. M82A1 SASR (Special Applications Scoped Rifle or Semi-Automatic Sniper Rifle), a .50 calibre sniper rifle used as ananti-materiel rifle. Snipers may also employ anti-materiel rifles in sniping roles against targets such as vehicles, equipment and structures, or for the long-range destruction of explosive devices; these rifles may also be used against personnel. Anti-materiel rifles tend to be semi-automatic and of a larger calibre than anti-personnel rifles, using cartridges such as the .50 BMG, 12.7x108mm Russian or even 14.5x114mm Russian and 20mm. These large cartridges are required to be able to fire projectiles containing payloads such as explosives, armour piercing cores, incendiaries or combinations of these, such as the Raufoss Mk211 projectile. Due to the considerable size and weight of anti-materiel rifles, 2- or 3-man sniper teams become necessary.
Barrels are normally of precise manufacture and of a heavier cross section than more traditional barrels in order to reduce the change in impact points between a first shot from a cold barrel and a follow-up shot from a warm barrel. Unlike many battle and assault rifles, the bores are usually not chromed to avoid inaccuracy due to an uneven treatment. When installed, barrels are often free-floated: i.e., installed so that the barrel only contacts the rest of the rifle at the receiver, to minimise the effects on impact point of pressure on the fore-end by slings, bipods, or the sniper’s hands. The end of the barrel is usually crowned or machined to form a rebated area around the muzzle proper to avoid asymmetry or damage, and consequent inaccuracy. Alternatively, some rifles such as the Dragunov or Walther WA2000 provide structures at the fore-end to provide tension on the barrel in order to counteract barrel drop and other alterations in barrel shape. External longitudinal fluting that contributes to heat dissipation by increasing surface area while simultaneously decreasing the weight of the barrel is sometimes used on sniper-rifle barrels. Sniper-rifle barrels may also utilise a threaded muzzle or combination device (muzzle brake or flash suppressor and attachment mount) to allow the fitting of a sound suppressor. These suppressors often have means of adjusting the point of impact while fitted. Military sniper rifles tend to have barrel lengths of 609.6 mm (24 inches) or longer, to allow the cartridge propellant to fully burn, reducing revealing muzzle flash and increasing bullet velocity. Police sniper rifles may use shorter barrels to improve handling characteristics. The shorter barrels’ velocity loss is unimportant at closer ranges; projectile energy is more than sufficient.
The most common special feature of a sniper rifle stock is the adjustable cheek piece, where the shooter’s cheek meets the rear of the stock. For most rifles equipped with a telescopic sight, this area is raised slightly, because the telescope is positioned higher than iron sights. A cheek piece is simply a section of the stock that can be adjusted up or down to suit the individual shooter. To further aid this individual fitting, the stock can sometimes also be adjusted for length, often by varying the number of inserts at the rear of the stock where it meets the shooter’s shoulder. Sniper stocks are typically designed to avoid making contact with the barrel of the weapon.
An adjustable sling is often fitted on the rifle, used by the sniper to achieve better stability when standing, kneeling, or sitting. The sniper uses the sling to “lock-in” by wrapping his non-firing arm into the sling forcing his arm to be still. Non-static weapon mounts such as bipods, monopodsand shooting sticks are also regularly used to aid and improve stability and reduce operator fatigue.
Comparison of 0.5, 1, and 3 MOA extreme spread levels against a human torso at 800 m (left) and a human head at 100 m (right)
A military-issue battle rifle or assault rifle is usually capable of between 3-6 minute of angle (MOA) (1-2 mrad) accuracy. A standard-issue military sniper rifle is typically capable of 1-3 MOA (0.3-1 mrad) accuracy, with a police sniper rifle capable of 0.25-1.5 MOA (0.1-0.5 mrad) accuracy. For comparison, a competition target orbenchrest rifle may be capable of accuracy up to 0.15-0.3 MOA (0.05-0.1 mrad). A 1 MOA (0.3 mrad) average extreme spread for a 5-shot group (meaning the center-to-center distance between the two most distant bullet holes in a shot-group) translates into 69% probability that the bullet’s point of impact will be in the circle with center in point of aim and diameter of 25 cm at 800 m (about 8 inches at 800 yards), which is considered sufficient to ensure a high probability of hitting a human shape at that distance. In 1982 a U.S. Army draft requirement for a Sniper Weapon System was: “The System will: (6) Have an accuracy of no more than 0.75 MOA (0.2 mrad) for a 5-shot group at 1,500 meters when fired from a supported, non-benchrest position”. Actual Sniper Weapon System (M24) adopted in 1988 has stated maximum effective range of 800 meters and a maximum allowed average mean radius (AMR) of 1.9 inches at 300 yards from a machine rest, what corresponds to a 0.6 MOA (0.5 mrad) extreme spread for a 5-shot group when using 7.62 x 51 mm M118 Special Ball cartridges.
Precision Weapon Engagement Ranges & Dispersion according to the US Army.
A 2008 United States military market survey for a Precision Sniper Rifle (PSR) calls for 1 MOA (0.3 mrad) extreme vertical spread for all shots in a 5-round group fired at targets at 300, 600, 900, 1,200 and 1,500 meters. In 2009 a United States Special Operations Command market survey calls for 1 MOA (0.3 mrad) extreme vertical spread for all shots in a 10-round group fired at targets at 300, 600, 900, 1,200 and 1,500 meters. The 2009 Precession Sniper Rifle requirements state that the PSR when fired without suppressor shall provide a confidence factor of 80% that the weapon and ammunition combination is capable of holding 1 MOA extreme vertical spread. This shall be calculated from 150 ten (10) round groups that were fired unsuppressed. No individual group shall exceed 1.5 MOA (0.5 mrad) extreme vertical spread. All accuracy will be taken at the 1,500 meter point. In 2008 the US military adopted the M110 Semi-Automatic Sniper System which has corresponding maximum allowed extreme spread of 1.8 MOA (0.5 mrad) for a 5-shot group on 300 feet, using M118LR ammunition or equivalent. In 2010 maximum bullet dispersion requirement for M24 .300 Winchester Magnum corresponds 1.4MOA extreme spread for 5 shot group on 100 meters. Although accuracy standards for police rifles do not widely exist, rifles are frequently seen with accuracy levels from 0.5-1.5 MOA (0.2-0.5 mrad). For typical policing situations an extreme spread accuracy level no better than 1 MOA (0.3 mrad) is usually all that is required. This is because police typically employ their rifles at short ranges. At 100 m or less, a rifle with a relatively low accuracy of only 1 MOA (0.3 mrad) should be able to repeatedly hit a 3 cm (1.2 inch) target. A 3 cm diameter target is smaller than the brain stem which is targeted by police snipers for its quick killing effect.
Maximum effective range
||Maximum effective range
|7.62x51mm (.308 Winchester)
|7 mm Remington Magnum
|.300 Winchester Magnum
|.338 Lapua Magnum
|.50 BMG (12.7x99mm NATO) 12.7x108mm (Russian)
|.408 Chey Tac
|20mm Anzio Sniper Rifle
The listed maximum ranges are mainly consistent with the claims made by military organizations and materiel manufacturers, but not based on consistent or strictly scientific criteria. The problem is only the bullet interacts with the target (can also be a materiel target for a sniper bullet). This implies that the properties of the target, properties and velocity of the employed bullet (parts) and desired effect are the most relevant factors. Unlike police sniper rifles, military sniper rifles tend to be employed at the greatest possible distances so that range advantages like the increased difficulty to spot and engage the sniper can be exploited. The most popular military sniper rifles (in terms of numbers in service) are chambered for 7.62 mm (0.30 inch) caliber ammunition, such as 7.62x51mm and 7.62x54mm R. Since sniper rifles of this class must compete with several other types of military weapons with similar range, snipers invariably must employ skilled fieldcraft to conceal their position. The recent trend in specialised military sniper rifles is towards larger calibres that offer relatively favorable hit probabilities at greater range, such as the anti-personnel .338 Lapua Magnumcartridge and anti-materiel cartridges like the .50 BMG and the 14.5x114mm. This allows snipers to take fewer risks, and spend less time finding concealment when facing enemies that are not equipped with similar weapons. Royal Marines snipers with L115A1 rifles. These rifles are similar to the L115A3Long Range Rifle used by Craig Harrison but outfitted with Schmidt & Bender 3-12×50 PM II telescopic sights.Maximum range claims made by military organizations and materiel manufacturers regarding sniper weapon systems are not based on consistent or strictly scientific criteria. The problem is only the bullet interacts after a relatively long flight path with the target (can also be a materiel target for a sniper bullet). This implies that variables such as the minimal required hit probability, local atmospheric conditions, properties and velocity of the employed bullet (parts), properties of the target and the desired terminal effect are major relevant factors that determine the maximum effective range of the employed system.
Longest recorded sniper kills
Longest recorded sniper kills
Reports regarding the longest recorded sniper kill
that contain information regarding the shooting distance and the identity of the sniper
have been presented to the general public since 1967. Snipers in modern warfare
have had a long history since the development of long distance weaponry. As weapons,ammunition
, and aids to determine ballistic solutions improved, so too did the distance a kill could be targeted from. The modern methodology of long-distance sniping (over 1.25-kilometre (0.8 mi) shots) requires intense training and practice. A sniper must have the ability to accurately estimate the various factors that influence a bullet
‘s trajectory and point of impact
, such as range to the target, wind direction, wind velocity, air density
and elevation of the sniper and target. Mistakes in estimation compound over distance and can cause a shot to only injure, or to miss completely.Devices such as laser rangefinders
, handheld meteorological measuring equipment, handheld computers, and ballistic-prediction software can contribute to increased accuracy.
The science of long-range sniping came to fruition in the Vietnam War
. Carlos Hathcock
held the record from 1967 to 2002 at 2,286 m (2,500 yd) He recorded 93 official kills before an injury halted his service on the front lines. After returning to the U.S., Hathcock helped to establish a school for training Marine snipers, the Marine Corps Scout Sniper
School, at the Marine base at Quantico, Virginia
. It took over thirty years for Canadian Master Corporal Arron Perry
of Princess Patricia’s Canadian Light Infantry
to beat Hathcock’s record. Perry held the title for only a few days as another man in his unit (Corporal Rob Furlong
) bested Perry’s distance with a 2,430 m (2,657 yd) shot in March 2002. Furlong took the shot while supporting American soldiers during Operation Anaconda
in the beginning years of the latest War in Afghanistan
. The current record is held by United Kingdom
‘s Corporal of Horse (CoH) Craig Harrison
, who in November of 2009 recorded a 2,475 m (2,707 yd) shot in the War in Afghanistan
Confirmed kills 1,250 m (1,367 yd) or greater
Carlos Hathcock in 1996
- ^ 93 kills was not an especially high number; otherAmerican snipers would best it and it pales in comparison to World War II snipers like Simo Häyhä. Häyhä was credited with over 500 kills during the Winter War but mostly shot at close range. In fact, Häyhä was famous for not using a scope, preferring to use the iron-sights on his rifles. What separated Hathcock and made him famous was his long distance ability and accuracy.
- ^ Longest confirmed kill using 12.7 mm multi-purpose ammunition
- ^ Longest confirmed kill with a 7.62x51mm NATOchambered rifle