Machine gun

Source: Wikipedia, the free encyclopedia.
This article is about the specific category of firearms. For the broader topic of all automatic firearms, see automatic firearm. For other uses, see Machine gun (disambiguation).
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Universal Machine gun Model 1959
A .50 caliber M2 machine gun: John Browning's design has been one of the longest-serving and most successful machine gun designs

A machine gun (MG) is a

20 mm (0.79 in) caliber or more are classified as autocannons
rather than machine guns.

As a class of military

kinetic projectile weapons, machine guns are designed to be mainly used as infantry support weapons and generally used when attached to a bipod or tripod, a fixed mount or a heavy weapons platform for stability against recoils. Many machine guns also use belt feeding and open bolt
operation, features not normally found on other infantry firearms.

Machine guns can be further categorized as

general-purpose machine guns, and squad automatic weapons
.

Modern overview

A vehicle with a Sumitomo M2 heavy machine gun mounted at the rear

Unlike

area denial over a sector of land with grazing fire. They are commonly mounted on fast attack vehicles such as technicals to provide heavy mobile firepower, armored vehicles such as tanks
for engaging targets too small to justify the use of the primary weaponry or too fast to effectively engage with it, and on aircraft as defensive armament or for strafing ground targets, though on fighter aircraft true machine guns have mostly been supplanted by large-caliber rotary guns.

Some machine guns have in practice sustained fire almost continuously for hours; other automatic weapons overheat after less than a minute of use. Because they become very hot, the great majority of designs fire from an

breech
between bursts. They also usually have either a barrel cooling system, slow-heating heavyweight barrel, or removable barrels which allow a hot barrel to be replaced.

Although subdivided into "

tripod
or on a vehicle; when carried on foot, the machine gun and associated equipment (tripod, ammunition, spare barrels) require additional crew members.

Light machine guns are designed to provide mobile fire support to a squad and are typically air-cooled weapons fitted with a box magazine or drum and a bipod; they may use full-size rifle rounds, but modern examples often use intermediate rounds. Medium machine guns use full-sized rifle rounds and are designed to be used from fixed positions mounted on a tripod. The heavy machine gun is a term originating in World War I to describe heavyweight medium machine guns and persisted into World War II with Japanese

Hotchkiss M1914 clones; today, however, it is used to refer to automatic weapons with a caliber of at least 12.7 mm (0.5 in),[3]
but less than 20 mm (0.8 in). A general-purpose machine gun is usually a lightweight medium machine gun that can either be used with a bipod and drum in the light machine gun role or a tripod and belt feed in the medium machine gun role.

DShK in the heavy role

Machine guns usually have simple iron sights, though the use of optics is becoming more common. A common aiming system for direct fire is to alternate solid ("ball") rounds and tracer ammunition rounds (usually one tracer round for every four ball rounds), so shooters can see the trajectory and "walk" the fire into the target, and direct the fire of other soldiers.

Many

Barrett M82
.

Other automatic weapons are subdivided into several categories based on the size of the bullet used, whether the cartridge is fired from a closed bolt or an open bolt, and whether the action used is locked or is some form of blowback.

Fully automatic firearms using pistol-caliber ammunition are called machine pistols or submachine guns largely on the basis of size; those using shotgun cartridges are almost always referred to as automatic shotguns. The term personal defense weapon (PDW) is sometimes applied to weapons firing dedicated armor-piercing rounds which would otherwise be regarded as machine pistols or SMGs, but it is not particularly strongly defined and has historically been used to describe a range of weapons from ordinary SMGs to compact assault rifles. Selective-fire rifles firing a full-power rifle cartridge from a closed bolt are called automatic rifles or battle rifles, while rifles that fire an intermediate cartridge are called assault rifles.

Assault rifles are a compromise between the size and weight of a pistol-caliber submachine gun and a full-size battle rifle, firing intermediate cartridges and allowing semi-automatic and burst or full-automatic fire options (selective fire), sometimes with both of the latter presents.

Operation

Direct impingement
Gas piston

Many machine guns are of the locked breech type, and follow this cycle:

  • Pulling (manually or electrically) the bolt assembly/bolt carrier rearward by way of the cocking lever to the point bolt carrier engages a sear and stays at rear position until trigger is activated making bolt carrier move forward
  • Loading fresh round into chamber and locking bolt
  • Firing round by way of a firing pin or striker (except for aircraft medium calibre using electric ignition primers) hitting the primer that ignites the powder when bolt reaches locked position.
  • Unlocking and removing the spent case from the chamber and ejecting it out of the weapon as bolt is moving rearward
  • Loading the next round into the firing chamber. Usually, the recoil spring (also known as main spring) tension pushes bolt back into battery and a cam strips the new round from a feeding device, belt or box.
  • Cycle is repeated as long as the trigger is activated by operator. Releasing the trigger resets the trigger mechanism by engaging a sear so the weapon stops firing with bolt carrier fully at the rear.

The operation is basically the same for all locked breech automatic firearms, regardless of the means of activating these mechanisms. There are also multi-chambered formats, such as revolver cannon, and some types, such as the Schwarzlose machine gun etc., that do not lock the breech but instead use some type of delayed blowback.

Design

Lewis gun reloading mechanism action

Most modern machine guns are of the locking type, and of these, most utilize the principle of

MG42
, are of this second kind. A cam, lever or actuator absorbs part of the energy of the recoil to operate the gun mechanism.

An externally actuated weapon uses an external power source, such as an electric motor or hand crank, to move its mechanism through the firing sequence. Modern weapons of this type are often referred to as

Minigun
is an exception to this. Whereas such weapons are highly reliable and formidably effective, one drawback is that the weight and size of the power source and driving mechanism makes them usually impractical for use outside of a vehicle or aircraft mount.

Mauser MK 213, were developed in World War II by the Germans to provide high-caliber cannons with a reasonable rate of fire and reliability. In contrast to the rotary format, such weapons have a single barrel and a recoil-operated carriage holding a revolving chamber with typically five chambers. As each round is fired, electrically, the carriage moves back rotating the chamber which also ejects the spent case, indexes the next live round to be fired with the barrel and loads the next round into the chamber. The action is very similar to that of the revolver pistols common in the 19th and 20th centuries, giving this type of weapon its name. A Chain gun
is a specific, patented type of Revolver cannon, the name, in this case, deriving from its driving mechanism.

MG42
– are capable of rates of fire in excess of 1,200 rounds per minute. Motorized Gatling guns can achieve the fastest firing rates of all, partly because this format involves extra energy being injected into the system from outside, instead of depending on energy derived from the propellant contained within the cartridges, partly because the next round can be inserted simultaneously with or before the ejection of the previous cartridge case, and partly because this design intrinsically deals with the unwanted heat very efficiently – effectively quick-changing the barrel and chamber after every shot. The multiple guns that comprise a Gatling being a much larger bulk of metal than other, single-barreled guns, they are thus much slower to rise in temperature for a given amount of heat, while at the same time they are also much better at shedding the excess, as the extra barrels provide a larger surface area from which to dissipate the unwanted thermal energy. In addition to that, they are in the nature of the design spun at very high speed during rapid fire, which has the benefit of producing enhanced air-cooling as a side-effect.

In weapons where the round seats and fires at the same time, mechanical timing is essential for operator safety, to prevent the round from firing before it is seated properly. Machine guns are controlled by one or more mechanical sears. When a sear is in place, it effectively stops the bolt at some point in its range of motion. Some sears stop the bolt when it is locked to the rear. Other sears stop the firing pin from going forward after the round is locked into the chamber. Almost all machine guns have a "safety" sear,[citation needed] which simply keeps the trigger from engaging.

History

Collection of old machine guns in the Međimurje County Museum (Čakovec, Croatia). From rear to front: Austro-Hungarian Schwarzlose M7/12, British Lewis, German MG 08.

The first successful machine-gun designs were developed in the mid-19th century. The key characteristic of modern machine guns, their relatively high rate of fire and more importantly mechanical loading,

Maxim machine gun
. Dr. Gatling also experimented with electric-motor-powered models; as discussed above, this externally powered machine reloading has seen use in modern weapons as well.

While technical use of the term "machine gun" has varied, the modern definition used by the Sporting Arms and Ammunition Manufacturers' Institute of America is "a fully automatic firearm that loads, fires and ejects continuously when the trigger is held to the rear until the ammunition is exhausted or pressure on the trigger is released."[5] This definition excludes most early manually operated repeating arms the Gatling gun and such as volley guns like the Nordenfelt gun.

Medieval

Detail of an 8-chambered matchlock revolver (Germany c. 1580)

The first known ancestors of multi-shot weapons were medieval

organ guns. An early example of an attempt at the mechanisation of one of these would be an 'engine of war' produced in the mid-1570s in England capable of firing from 160 to 320 shots 4, 8, 12 or 24 bullets at a time at a rate of fire up to roughly 3 times the rate of fire of the typical arquebusier of the day. It was also claimed that the gun could be reloaded 'as often as you like' and fired no matter the weather though the English government never adopted the weapon despite testing being carried out at the Tower of London.[6][7] The first firearms to have the ability to fire multiple shots from a single barrel without a full manual reload were revolvers made in Europe in the late 1500s. One is a shoulder-gun-length weapon made in Nuremberg, Germany, circa 1580. Another is a revolving arquebus, produced by Hans Stopler of Nuremberg in 1597.[8]

17th century

True repeating long arms were difficult to manufacture prior to the development of the unitary firearm cartridge; nevertheless, lever-action repeating rifles such as the Kalthoff repeater and Cookson repeater were made in small quantities in the 17th century.

Perhaps the earliest examples of predecessors to the modern machine gun are to be found in East Asia. According to the Wu-Pei-Chih, a booklet examining Chinese military equipment produced during the first quarter of the 17th century, the Chinese army had in its arsenal the 'Po-Tzu Lien-Chu-P'ao' or 'string-of-100-bullets cannon'. This was a repeating cannon fed by a hopper containing balls which fired its charges sequentially. The way it worked was similar to the Perkins steam gun of 1824 or the Beningfield electrolysis gun of 1845 only slow-burning gunpowder was used as the propelling force in place of steam or the gases produced by electrolysis.[9] Another repeating gun was produced by a Chinese commoner, Dai Zi, in the late 17th century. This weapon was also hopper-fed and never went into mass production.[10]

In 1655, a way of loading, aiming and shooting up to 6 wall muskets 60 times in a minute for a total rate of fire of 360 shots per minute was mentioned in The Century of Inventions by Edward Somerset, 2nd Marquess of Worcester, though, like all the inventions mentioned in the book, it is uncertain if it was ever built.[11]

It is sometimes claimed (i.e. in

Prince Rupert, though its type and method of operation are unknown.[13]

18th century

Bucklers Hard
Maritime Museum

In 1708, it was reported from Constantinople that a French officer had invented a very light cannon that could fire from a single barrel 30 shots in 2 and a half minutes for a total rate of fire of 12 shots a minute.[14][15]

In 1711, a French lawyer called Barbuot presented to the parliament of Dijon a crank-operated 'war machine' made up of 10 carbine barrels and loaded via a 'drum' capable of firing in vollies. It was said to be accurate at 400 to 500 paces and to strike with enough force to pierce 2 or 3 men at a time when close. It was also claimed to be able to shoot 5 or 6 times before infantry came within musket range or cavalry within pistol range and with no more space between each shot than the time needed to prime a pistol, cock it and release the hammer as well as being nearly as manoeuvrable as cavalry. An alternative and heavier version was said to be able to throw grenades and it was also proposed to equip the machine with a bellows for clearing smoke that built up during firing.[16][17]

Another early revolving gun was created by

Puckle Gun" on May 15, 1718. It was a design for a manually operated 1.25 in. (32 mm) caliber, flintlock cannon with a revolver cylinder able to fire 6–11 rounds before reloading by swapping out the cylinder, intended for use on ships.[18] It was one of the earliest weapons to be referred to as a machine gun, being called such in 1722,[19] though its operation does not match the modern usage of the term. According to Puckle, it was able to fire round bullets at Christians and square bullets at Turks.[18]
However, it was a commercial failure and was not adopted or produced in any meaningful quantity.

In 1729, a report was written in France on a machine capable of firing 600 balls in a few minutes.[20]

In 1720, a French inventor called Philippe Vayringe invented a small cannon that could fire 16 shots in succession, which he demonstrated before the Duke of Lorraine.[21] In 1737, it was mentioned that Jacob de Weinholtz, a Dane who was serving in the Portuguese army, had invented a cannon capable of firing 20 to 30 shots a minute though requiring 15 people to work it. The cannons were brought along with a Portuguese fleet sent to India to take part in a colonial war in the 1740s.[22][23] Also in 1737, it was mentioned that a German engineer had invented a 10-pounder cannon capable of firing 20 times in a minute.[24] In 1740, a cannon able to shoot 11 times per minute was developed by a Frenchman called Chevalier de Benac.[25] Meanwhile, not long after in England, in 1747 a cannon able to simultaneously charge and discharge itself 20 times in a minute was invented by James Allis and presented to the Royal Society of England.[26] In 1750, in Denmark, a Prussian known as Captain Steuben of the Train of Artillery invented a breech-loading cannon worked by 4 people and fed by paper cartridges capable of firing 24 times in a minute and demonstrated it to the King of Denmark along with some other high-ranking officials in the same year.[27][28] In 1764, Frenchman Ange Goudar wrote in his work The Chinese Spy that he had assisted in Paris in the proofing of a 'great gun' capable of firing 60 times in a minute.[29] In 1773, another cannon capable of firing 23 or 24 times in a minute and cleaning itself after every shot was invented by Thomas Desaguliers.[30][31] In 1775, it was mentioned that in England two large cannons invented by an unidentified matross at Woolwich had achieved a rate of fire of 59 shots in 59 and a half seconds.[32][33]

Also in 1775, a breech-loading volley gun, similar to the later mitrailleuse, was invented by a Frenchman called Du Perron which was worked by 3 or 4 men and capable of discharging 24 barrels 10 times a minute for a total rate of fire of 240 shots per minute.[34]

In 1776, a gun capable of charging and discharging itself 120 times 'by the motion of one hand only' in a minute was invented in England by an inventor from the county of Westmoreland.[35]

In 1777, Philadelphia gunsmith Joseph Belton offered the Continental Congress a "new improved gun", which was capable of firing up to twenty shots in five seconds; unlike older repeaters using complex lever-action mechanisms, it used a simpler system of superposed loads, and was loaded with a single large paper cartridge. Congress requested that Belton modify 100 flintlock muskets to fire eight shots in this manner, but rescinded the order when Belton's price proved too high.[36][37]

In 1779, a machine made up of 21 musket barrels worked by 3 men was produced by a British inventor called William Wilson Wright which he claimed could be fired 3 times quicker than a single man could load and fire a musket 3 times.[38]

In 1788, a Swiss soldier invented a machine worked by 10 men capable of discharging 300 balls in 3 minutes.[39]

Also in 1788, it was reported that a Prussian officer had invented a gun capable of firing 400 balls one after the other.[40][41]

In 1790, a former officer in the French military known as Joseph-François-Louis Grobert invented a 'ballistic machine' or 'pyroballistic machine' with multiple barrels operated by 4 men and a continuous rotational movement capable of firing 360 rifle shots a minute in a variety of calibers.[42][43]

In 1792, a French artist known as Renard invented a piece of ordnance that could be operated by one man and fired 90 shots a minute.[44][45]

Also in 1792, a French mechanic called Garnier invented a musket battery made up of 15 barrels capable of firing 300 shots in 2 minutes for a total rate of fire of 150 shots a minute or 10 shots per minute per barrel and of being operated by one man.[46]

19th century

In the early and mid-19th century, a number of rapid-firing weapons appeared which offered multi-shot fire, mostly volley guns. Volley guns (such as the Mitrailleuse) and double-barreled pistols relied on duplicating all parts of the gun, though the Nock gun used the otherwise-undesirable "chain fire" phenomenon (where multiple chambers are ignited at once) to propagate a spark from a single flintlock mechanism to multiple barrels. Pepperbox pistols also did away with needing multiple hammers but used multiple manually operated barrels. Revolvers further reduced this to only needing a pre-prepared cylinder and linked advancing the cylinder to cocking the hammer. However, these were still manually operated.

In 1805, a British inventor from Northampton designed a cannon that would prime, load and fire itself 10 times a minute.[47]

In 1806, a Viennese copper engraver and mechanic known as Mr Putz invented a machine cannon that could load, fire and clean itself once every second or potentially up to 60 times a minute though the rate of fire was limited by the overheating of the barrel.[48]

In 1819, an American inventor from Baltimore designed a gun with 11 barrels that could fire 12 times in a minute for a total rate of fire of 132 shots a minute.[49]

In 1821, a muzzle-loading repeating cannon capable of firing 30 shots in 6 minutes or 5 shots per minute was demonstrated in England by the French-American "Fire King" Ivan Ivanitz Chabert. It was worked by a "wheel" fed by paper cartridges from a store attached to the cannon and ignited using a match from a match-holder somewhere else on the cannon.[50][51][52]

In 1825 an Italian book attempting to catalogue all topographic features of all known countries on Earth mentioned that in France there were 'mechanical rifles' used to defend warehouses that were capable of firing 120 shots without reloading.[53]

In 1828, a swivel gun that did not need cleaning or muzzle-loading and was capable of being made to any dimensions and used as an ordinary cannon at a moment's notice and firing 40 shots a minute was invented by a native of Ireland.[54]

In France, in 1831, a mechanic from the Vosges department invented a lever-operated cannon that could fire 100 shots a minute.[55]

In 1832, a machine capable of firing 500 rifle shots a minute was devised by Hamel, a French mechanic.[56]

In the mid-1830s, a machine gun was designed by John Steuble (Swiss), who tried to sell it to the Russian, English and French governments. The English and Russian governments showed interest but the former refused to pay Steuble, who later sued them for this transgression, and the latter tried to imprison him. The French government showed interest at first and while it noted that mechanically there was nothing wrong with Steuble's invention it turned him down, stating that the machine both lacked novelty and could not be usefully employed by the army. The gun was reportedly breech-loading, fed by cartridges from some kind of hopper and could fire 34 barrels of one-inch calibre 4 or 6 times for a total of 136 or 204 shots a minute.[57][58][59][60][61]

A detachment of French infantry with 2 Saint-Etienne Model 1907 machine guns (c. b1914)

A biography of William Lyon Mackenzie mentions that in 1839 a Detroit-based inventor was working on a cannon that could be fired 50 to 60 times in a minute.[62]

In 1842, Dr. Thomson or Thompson, an American, invented a cannon fed by pre-loaded breech-pieces with 4 barrels that was operated by means of a revolving cylinder and could be fired 50 times in as many seconds or even up to 500 times in 500 seconds.[63][64]

In 1846, Mr. Francis Dixon, an American, invented a cannon that loaded, primed and discharged itself through the use of a brake at a rate of fire of 30 to 40 shots a minute. A variation of it was worked by clockwork-like machinery and could be made to move by itself a certain distance along rails before firing 10 times and returning to its original position.[65][66]

Also in 1846, in Canada, inventor Simeon "Larochelle" Gautron, invented a cannon that was similar to a wooden model of a repeating cannon he constructed in 1836 but for which he had made a number of improvements since then which could be fired 10 or 12 times in a minute when the typical muzzle-loading cannon of the day could be fired at only a fraction of that speed, and an English newspaper reporting on it claimed it could be fired up to 60 times in the same period of time, and clean itself after every shot. It was worked by a crank, could be worked by one man when the typical cannon of the day required twelve or more, was fed by paper cartridges from a revolving cylinder and used separate percussion caps for ignition. Larochelle tried to interest the Canadian military in his invention but was turned down for reasons of complexity and expense which, while it drew some criticism from the French language Canadian press, led to the inventor discontinuing development of it in favour of more profitable activities. A model of Larochelle's cannon is still on display at the Musee National des Beaux-Arts du Quebec.[67][68][69]

In 1847, a short description of a prototype electrically ignited mechanical machine gun was published in Scientific American by J.R. Nichols. The model described is small in scale and works by rotating a series of barrels vertically so that it is feeding at the top from a "tube" or hopper and could be discharged immediately at any elevation after having received a charge, according to the author.[70]

In 1848, the Italian Cesare Rosaglio announced his invention of a machine gun capable of being operated by a single man and firing 300 rifle shots a minute or 12,000 in an hour after taking into account the time needed to reload the "tanks" of ammunition.[71]

In June 1851, a model of a 'war engine' allegedly capable of firing 10,000 ball cartridges in 10 minutes was demonstrated by a British inventor called Francis McGetrick.[72]

In 1852, a rotary cannon using a unique form of wheellock ignition was demonstrated by Delany, an Irish immigrant to America.[73]

In 1854, a British patent for a mechanically operated machine gun was filed by Henry Clarke. This weapon used multiple barrels arranged side by side, fed by a revolving cylinder that was in turn fed by hoppers, similar to the system used by Nichols. The gun could be fired by percussion or electricity, according to the author. Unlike other mechanically operated machine guns of the era, this weapon did not use any form of self-contained cartridge, with firing being carried out by separate percussion caps.[74] A model of this weapon, said to be capable of firing 1800 shots in a minute with great precision at 2000 yards and drawn by two horses, was constructed and tested though apparently not adopted for the military.[75][76] In the same year, water cooling was proposed for machine guns by Henry Bessemer, along with a water cleaning system, though he later abandoned this design. In his patent, Bessemer describes a hydropneumatic delayed-blowback-operated, fully automatic cannon. Part of the patent also refers to a steam-operated piston to be used with firearms but the bulk of the patent is spent detailing the former system.[77]

In America, a patent for a machine gun-type weapon was filed by John Andrus Reynolds in 1855.[78] Another early American patent for a manually operated machine gun with a blowback-operated cocking mechanism was filed by C. E. Barnes in 1856.[79]

In France and Britain, a mechanically operated machine gun was patented in 1856 by Frenchman Francois Julien. This weapon was a cannon that fed from a type of open-ended tubular magazine, only using rollers and an endless chain in place of springs.[80]

The

Agar Gun
, otherwise known as a "coffee-mill gun" because of its resemblance to a coffee mill, was invented by Wilson Agar at the beginning of the US Civil War. The weapon featured mechanized loading using a hand crank linked to a hopper above the weapon. The weapon featured a single barrel and fired through the turning of the same crank; it operated using paper cartridges fitted with percussion caps and inserted into metal tubes that acted as chambers; it was therefore functionally similar to a revolver. The weapon was demonstrated to President Lincoln in 1861. He was so impressed with the weapon that he purchased 10 on the spot for $1,500 apiece. The Union Army eventually purchased a total of 54 of the weapons. However, due to antiquated views of the Ordnance Department the weapons, like its more famous counterpart the Gatling Gun, saw only limited use.

The

Franco-Prussian war and North-West Rebellion. Many were sold to other armies in the late 19th century and continued to be used into the early 20th century until they were gradually supplanted by Maxim guns. Early multi-barrel guns were approximately the size and weight of contemporary artillery pieces, and were often perceived as a replacement for cannon firing grapeshot or canister shot.[81] The large wheels required to move these guns around required a high firing position, which increased the vulnerability of their crews.[81] Sustained firing of gunpowder cartridges generated a cloud of smoke, making concealment impossible until smokeless powder became available in the late 19th century.[82] Gatling guns were targeted by artillery they could not reach, and their crews were targeted by snipers they could not see.[81] The Gatling gun was used most successfully to expand European colonial empires, since against poorly equipped indigenous armies it did not face such threats.[81]

In 1864, in the aftermath of the Second Schleswig War, Denmark started a program intended to develop a gun that used the recoil of a fired shot to reload the firearm though a working model would not be produced until 1888.[83]

In 1870, a Lt. Holsten Friberg of the Swedish army patented a fully automatic recoil-operated firearm action and may have produced firing prototypes of a derived design around 1882: this was the forerunner to the 1907 Kjellman machine gun, though, due to rapid residue buildup from the use of black powder, Friberg's design was not a practical weapon.[84]

Also in 1870, the Bavarian regiment of the Prussian army used a unique mitrailleuse-style weapon in the Franco-Prussian war. The weapon was made up of four barrels placed side by side that replaced the manual loading of the French mitrailleuse with a mechanical loading system featuring a hopper containing 41 cartridges at the breech of each barrel. Although it was used effectively at times, mechanical difficulties hindered its operation and it was ultimately abandoned shortly after the war ended (de).[85]

Maxim and World War I

A model of a typical entrenched German machine gunner in World War I. He is operating an MG 08, wearing a Stahlhelm and cuirass to protect him from shell fragments, and protected by rows of barbed wire and sandbags.

The first practical self-powered machine gun was invented in 1884 by

Maxim machine gun used the recoil power of the previously fired bullet to reload rather than being hand-powered, enabling a much higher rate of fire than was possible using earlier designs such as the Nordenfelt and Gatling weapons. Maxim also introduced the use of water cooling, via a water jacket around the barrel, to reduce overheating. Maxim's gun was widely adopted, and derivative designs were used on all sides during the First World War. The design required fewer crew and was lighter and more usable than the Nordenfelt and Gatling guns. First World War combat experience demonstrated the military importance of the machine gun. The United States Army issued four machine guns per regiment in 1912, but that allowance increased to 336 machine guns per regiment by 1919.[86]

gas masks
.

Heavy guns based on the Maxim such as the

wire entanglements
, machine guns earned a fearsome reputation.

Another fundamental development occurring before and during the war was the incorporation by gun designers of machine gun auto-loading mechanisms into handguns, giving rise to semi-automatic pistols such as the

Beretta 1918
).

Aircraft-mounted machine guns were first used in combat in

Fokker Eindecker
, the first German plane to incorporate the new technology.

Interwar era and World War II

Suomi M31 submachine gun with 70-round drum magazine attached, 20- and 50-round box magazines

As better materials became available following the First World War, light machine guns became more readily portable; designs such as the

Browning M2
became clearer. New designs largely abandoned water jacket cooling systems as both undesirable, due to a greater emphasis on mobile tactics; and unnecessary, thanks to the alternative and superior technique of preventing overheating by swapping barrels.

MG 42 with retracted bipod

The interwar years also produced the first widely used and successful general-purpose machine gun, the German MG 34. While this machine gun was equally able in the light and medium roles, it proved difficult to manufacture in quantity, and experts on industrial metalworking were called in to redesign the weapon for modern tooling, creating the MG 42. This weapon was simpler, cheaper to produce, fired faster, and replaced the MG 34 in every application except vehicle mounts since the MG 42's barrel changing system could not be operated when it was mounted.

Cold War

GAU-17/A
Minigun

Experience with the MG 42 led to the US issuing a requirement to replace the aging Browning Automatic Rifle with a similar weapon, which would also replace the M1919; simply using the MG 42 itself was not possible, as the design brief required a weapon which could be fired from the hip or shoulder like the BAR. The resulting design, the M60 machine gun, was issued to troops during the Vietnam War.

As it became clear that a high-volume-of-fire weapon would be needed for fast-moving jet aircraft to reliably hit their opponents, Gatling's work with electrically powered weapons was recalled and the 20 mm

minigun
" soon in production for use on helicopters, where the volume of fire could compensate for the instability of the helicopter as a firing platform.

Human interface

Further information:
Ground mount
This M60 machine gun is part of an XM2 armament subsystem; it is aimed and fired from the aircraft rather than directly.

The most common interface on light machine guns is a

hand cranks, and modern externally powered machine guns, such as miniguns, commonly use an electronic button or trigger on a joystick. In the late 20th century, scopes and other complex optics became more common rather than the more basic iron sights
.

Loading systems in early manual machine guns were often from a hopper of loose (un-linked) cartridges. Manually operated volley guns usually had to be reloaded all at once (each barrel reloaded by hand, or with a set of cartridges affixed to a plate that was inserted into the weapon). With hoppers, the rounds could often be added while the weapon was firing. This gradually changed to belt-fed systems, which were either held by a person (the shooter or a support person), or in a bag or box. Some modern vehicle machine guns use linkless feed systems.

Modern machine guns are commonly mounted in one of four ways. The first is a

US Helicopter Armament Subsystems
.

See also

References

  1. ^ "Machine gun | History, Description, & Facts | Britannica". www.britannica.com. Archived from the original on 2020-10-01. Retrieved 2023-03-06.
  2. OCLC 441045309.{{cite book}}: CS1 maint: others (link
    )
  3. ^ "Machine Guns and Machine Gun Gunnery" (PDF). US Marine Corps. Archived (PDF) from the original on 19 February 2018. Retrieved 23 December 2017.
  4. ISBN 0-425-10355-2
    .
  5. ^ a b "SAAMI.org terminology glossary". Sporting Arms and Ammunition Manufacturers' Institute. Archived from the original on 2003-08-24. Retrieved 2015-08-23.
  6. ^ "Letters and papers described in the published Calendar of State Papers, Domestic: Edward VI, Mary, and Elizabeth". Archived from the original on 2022-11-26. Retrieved 2022-11-26.
  7. ISBN 9783752531671. Archived
    from the original on 2023-09-07. Retrieved 2022-12-20.
  8. ISBN 978-0-313-32796-4
    .
  9. ISBN 978-0-486-29593-0. Archived
    from the original on 2023-12-16. Retrieved 2019-01-10.
  10. ISBN 978-0-521-30358-3. Archived
    from the original on 2023-12-16. Retrieved 2019-01-10.
  11. ^ Worcester.), Edward SOMERSET (2nd Marquis of (April 3, 1825). "A Century of the Names and Scantlings of Such Inventions, as at Present I Can Call to Mind to Have Tried and Perfected, Etc. With Historical and Explanatory Notes, and a Biographical Memoir by C.F. Partington". Archived from the original on December 16, 2023. Retrieved June 25, 2021 – via Google Books.{{cite web}}: CS1 maint: numeric names: authors list (link)
  12. ISBN 9781851094806. Archived
    from the original on December 16, 2023. Retrieved October 17, 2020 – via Google Books.
  13. ^ Birch, Thomas (1756). "The History of the Royal Society of London for Improving of Natural Knowledge, from Its First Rise: In which the Most Considerable of Those Papers Communicated to the Society, which Have Hitherto Not Been Published, are Inserted in Their Proper Order, as a Supplement to the Philosophical Transactions". Archived from the original on 2023-12-16. Retrieved 2020-11-07.
  14. ^ "Inventaire sommaire des archives historiques (Archives anciennes. Correspondance)". Paris, Imprimerie nationale. 1898.
  15. ^ "Le Chasseur Français N°595 Janvier 1940 Page 60". Archived from the original on 2022-03-08. Retrieved 2022-03-08.
  16. ^ "Inventaire sommaire des archives historiques (Archives anciennes. Correspondance)". Paris, Imprimerie nationale. 1898.
  17. ^ "Le Chasseur Français N°595 Janvier 1940 Page 60". Archived from the original on 2022-03-08. Retrieved 2022-03-08.
  18. ^ a b Original patent claim reproduced in: Francis Bannerman Sons, Bannerman Military Goods Catalogue #28 (1954) p. 103
  19. ^ "The Armoury of His Grace the Duke of Buccleuch and Queensberry" (PDF). University of Huddersfield. Archived (PDF) from the original on 2016-03-04. Retrieved 2015-08-23.
  20. ^ ""Mémoires, rapports, correspondance concernant diverses inventions et propositions, 1729-1784 : Machine pour tirer 600 balles en quelques minutes ; moulins à bras pour le service des vivres ; « pompes et agrès servant à remédier aux accidents... | Service historique de la Défense". Archived from the original on 2023-11-18. Retrieved 2023-11-18.
  21. ^ Davenport, Richard Alfred (1841). "Lives of Individuals who Raised Themselves from Poverty to Eminence Or Fortune". Archived from the original on 2023-12-16. Retrieved 2022-11-01.
  22. ^ "Mercure français". 1737. Archived from the original on 2023-12-16. Retrieved 2021-09-18.
  23. ^ Mhamai, S. K. (1984). "SAWANTS OF WADI Coastal Politics in 18th and 19th Centuries".
  24. ^ "German 10-pounder firing 20 times a minute". 28 May 1737. p. 2 – via British Newspaper Archive.
  25. ^ "Chevalier de Benac develops canon that shoots 11 times a minute". 27 September 1740. p. 2 – via British Newspaper Archive.
  26. ^ Worcester.), Edward SOMERSET (2nd Marquis of (April 3, 1825). "A Century of the Names and Scantlings of Such Inventions, as at Present I Can Call to Mind to Have Tried and Perfected, Etc. With Historical and Explanatory Notes, and a Biographical Memoir by C.F. Partington" – via Google Books.{{cite web}}: CS1 maint: numeric names: authors list (link)
  27. ^ "Breech-loading canon demonstrated to King of Denmark". 27 February 1750. p. 4 – via British Newspaper Archive.
  28. ^ "The Universal Magazine". 1750.
  29. ^ "The Universal Magazine of Knowledge and Pleasure". 1764.
  30. ^ "The Annual Register". 1803.
  31. ^ Duncan, Francis (1879). "History of the Royal Regiment of Artillery".
  32. ^ "Newspapers.com". Archived from the original on 2021-09-18. Retrieved 2021-09-18.(subscription required)
  33. ^ Sands, Brymer, Murray and Cochran (1775). "Scots Magazine, and Edinburgh Literary Miscellany, Volume 37".{{cite web}}: CS1 maint: multiple names: authors list (link)
  34. OCLC 405531902
  35. ^ "120-times-a-minute discharging gun invented". 6 April 1776. p. 1 – via British Newspaper Archive.
  36. ISBN 978-0-486-41244-3
    .
  37. ^ United States Continental Congress (1907). Journals of the Continental Congress. USGPO. pp. 324, 361.
  38. ^ "wright-musket-machine". 17 July 1779. p. 3 – via British Newspaper Archive.
  39. ^ "The Gentleman's Magazine – Google Books". 1789. Archived from the original on 2023-12-16. Retrieved 2022-02-27.
  40. ^ "Maryland Gazette: Thursday, August 28, 1788" (PDF). msa.maryland.gov. Archived (PDF) from the original on 26 April 2022. Retrieved 20 August 2022.
  41. ^ "prussian-gun-firing-400-balls". 26 May 1788. p. 2 – via British Newspaper Archive.
  42. ^ France (1789). "Procès-verbal des séances de l'Assemblée nationale: 1789–1791". Archived from the original on 2023-12-16. Retrieved 2021-08-06.
  43. ^ Procès-verbal de l'Assemblée des communes et de l'Assemblée nationale, imprimé par son ordre. Chez Badouin, Impr. de l'Assemblée nationale. Archived from the original on 2021-07-09. Retrieved 2021-06-30.
  44. ^ "French artists invents ordnance that can fire 90-times-a-minute". 24 August 1792. p. 2 – via British Newspaper Archive.
  45. ^ "The Gentleman's Magazine". 1792. Archived from the original on 2023-12-16. Retrieved 2021-08-06.
  46. ^ "Archives Parlementaires". Archived from the original on 2022-10-31. Retrieved 2022-04-26.
  47. ^ Burke, Edmund (1805). "Annual Register". Archived from the original on 2023-12-16. Retrieved 2022-04-30.
  48. ^ "Zeitung für Industrie und Handlung". 1806. Archived from the original on 2023-12-16. Retrieved 2022-09-08.
  49. ^ "Newspapers.com". Archived from the original on 2022-04-28. Retrieved 2022-04-20.(subscription required)
  50. ^ "Muzzle-loading cannon firing 5-shots-per-minute demonstrated". 13 January 1821. p. 1 – via British Newspaper Archive.
  51. ^ "Newspapers.com". Archived from the original on 2021-09-20. Retrieved 2021-09-20.(subscription required)
  52. ^ "Muzzle-loading cannon firing 5-shots-per-minute demonstrated by Chabert". 12 April 1823. p. 3 – via British Newspaper Archive.
  53. ^ Pagnozzi, G. R. (1825). "Geografia moderna universale: ovvero descrizione fisica, statistica topografica di tutti i paesi conosciuti della terra, Volume 10". Archived from the original on 2023-12-16. Retrieved 2023-10-30.
  54. ^ "Irish native invents swivel gun that can fire 40-shots-per-minute". 3 July 1828. p. 3 – via British Newspaper Archive.
  55. ^ "French mechanic invents lever-operated cannon that fires 100-shots-per-minute". 16 June 1831. p. 4 – via British Newspaper Archive.(subscription required)
  56. ^ "Annales". 1831. Archived from the original on 2023-12-16. Retrieved 2020-10-17.
  57. ISBN 979-1-02-100758-1. Archived
    from the original on 2023-12-16. Retrieved 2019-08-26.
  58. ^ "Infernal Machine". John Bull "For God, the King, and the People!". Vol. XVI, no. 807. Archived from the original on 2019-06-16. Retrieved 2019-08-26 – via LastChanceToRead.com.
  59. ^ "La Presse". Gallica (in French). 1838-05-22. Archived from the original on 2019-08-12. Retrieved 2019-08-26.
  60. ^ Koenigliches Kings Ministerium. Die von dem Schweizer Johann Steuble erfundene, von Alexander Heilbronn in London zum Kaufe angebotene neuartige Kriegswaffe (Salvengeschütz), 1836 – 1837 (Report) (in German and French). Bayerische Hauptstaatsarchiv.
  61. ^ "Machine gun invented by John Steuble that fires up to 204 shots-per-minute". 23 November 1836. p. 5 – via British Newspaper Archive.
  62. ^ Lindsey, Charles (1862). "The Life and Times of Wm. Lyon Mackenzie: With an Account of the Canadian Rebellion of 1837, and the Subsequent Frontier Disturbances, Chiefly from Unpublished Documents". Archived from the original on 2023-12-16. Retrieved 2021-08-24.
  63. ^ "Cannon invented that can be fired 50-times-per-minute". 22 September 1842. p. 1 – via British Newspaper Archive.
  64. ^ Weekly Globe, Volume 1. Blair & Reeves. 1842. p. 609. Archived from the original on 2023-12-16. Retrieved 2022-06-21.
  65. ^ "Self priming and discharging Canon invented with 30 to 40 shots-per-minute". 27 October 1846. p. 2 – via British Newspaper Archive.
  66. ^ "Newspapers.com". Archived from the original on 2021-10-25. Retrieved 2021-09-19.(subscription required)
  67. ^ "Canon invented by Simeon 'Larochelle' Gautron". 7 November 1846. p. 1 – via British Newspaper Archive.
  68. ^ "Le Journal de Québec" (in French). Archived from the original on 2021-02-06. Retrieved 2021-02-02.
  69. ^ "Canon de Larochelle – Gautron dit Larochelle, Siméon". Collections | MNBAQ. Archived from the original on 2021-05-16. Retrieved 2021-04-03.
  70. ^ Scientific American. Munn & Company. 1847. p. 172. Archived from the original on 2023-12-16. Retrieved 2019-01-10.
  71. ^ AC09990011, Anonymus (April 10, 1848). "Foglio ufficiale. L'Indipendente dell' alto Po". Feraboli. Archived from the original on December 16, 2023. Retrieved October 17, 2020 – via Google Books.{{cite web}}: CS1 maint: numeric names: authors list (link)
  72. ^ Ellis (F.L.S.), Robert (April 10, 1851). "Index and introductory. Raw materials. Machinery.-v.2. Manufactures. Fine arts. Colonies.-v.3 Foreign states". Spicer brothers. Archived from the original on December 16, 2023. Retrieved October 17, 2020 – via Google Books.
  73. ^ Tompkins, William Ward (April 10, 1851). "United Service Journal: Devoted to the Army, Navy and Militia of the United States". W.W. Tompkins. Archived from the original on December 16, 2023. Retrieved October 17, 2020 – via Google Books.
  74. ^ office, Great Britain Patent; Woodcroft, Bennet (23 December 2017). "Abridgments of the Specifications Relating to Fire-arms and Other Weapons, Ammunition, and Accoutrements: A.D. 1588–1858-Pt. II. A.D. 1858–1866". Printed by George E. Eyre and William Spottiswoode, pub. at the Great seal patent office. p. 163. Archived from the original on 16 December 2023. Retrieved 10 January 2019.
  75. ^ https://www.britishnewspaperarchive.co.uk/viewer/bl/0000418/18540617/001/0003(subscription required)
  76. ^ https://www.britishnewspaperarchive.co.uk/viewer/bl/0000408/18540608/038/0003(subscription required)
  77. ^ "Provisional Specifications Not Proceeded with". The Mechanics' Magazine. R. A. Brooman. 1855. p. 259. Archived from the original on 2023-12-16. Retrieved 2019-01-10.
  78. ^ "Improvement in fire-arms". Google Patents. Archived from the original on 16 December 2023. Retrieved 23 December 2017.
  79. ^ "HyperWar: The Machine Gun (Vol. /Part )". Ibiblio.org. Archived from the original on 25 December 2017. Retrieved 23 December 2017.
  80. ^ Office, Patent (1859). Patents for inventions. Abridgments of specifications. p. 265.
  81. ^ a b c d Emmott, N.W. "The Devil's Watering Pot" United States Naval Institute Proceedings September 1972 p. 70
  82. ^ Emmott, N.W. "The Devil's Watering Pot" United States Naval Institute Proceedings September 1972 p. 72
  83. ^ "Sidste skud fra det danske maskingevær Madsen". www.avisen.dk. 3 April 2008. Archived from the original on 6 May 2021. Retrieved 3 April 2021.
  84. ^ "HyperWar: The Machine Gun (Vol. I/Part III)". Ibiblio.org. Archived from the original on 22 December 2017. Retrieved 23 December 2017.
  85. ISBN 978-1-4728-0598-0. Archived
    from the original on 2023-12-16. Retrieved 2019-01-10.
  86. ^ Ayres, Leonard P. (1919). The War with Germany (Second ed.). Washington, D.C.: United States Government Printing Office. p. 65.

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