A submachine gun, abbreviated SMG, is a magazine
-fed, automatic carbine
designed to fire handgun cartridge
s. The term "submachine gun" was coined by John T. Thompson
, the inventor of the Thompson submachine gun
, to describe its design concept as an automatic firearm
with notably less firepower
than a machine gun
(hence the prefix "sub-
"). As a machine gun must fire rifle cartridge
s to be classified as such, submachine guns are not considered machine guns.
The submachine gun was developed during World War I
(1914–1918) as close quarter
offensive weapons, mainly for trench raiding
. At its peak during World War II
(1939–1945), millions of SMGs were made for use by regular troop
s, clandestine commando
s and partisan
s alike. After the war, new SMG designs appeared frequently.
[Military Small Arms Of The 20th Century. Ian Hogg & John Weeks. Krause Publications. 2000. p93]
However, by the 1980s, SMG usage decreased.
Today, submachine guns have been largely replaced by assault rifles
which have a longer effective range
and are capable of penetrating the helmet
s and body armor
used by modern infantry
[David Crane (December 11, 2011)]
Submachine Guns (SMG’s): Outpaced by Today’s Modern Short-Barreled Rifles (SBR’s)/Sub-Carbines, or Still a Viable Tool for Close Quarters Battle/Close Quarters Combat (CQB/CQC)?
However, submachine guns are still used by military special forces
and police SWAT teams
for close quarters battle (CQB) because they are "a pistol-caliber weapon that's easy to control, and less likely to overpenetrate
World War I
During World War I
introduced the world's first machine pistol
: the Steyr Repetierpistole M1912/P16
. The Germans also experimented with machine pistols by converting pistol
s such as the Mauser C96
and Luger P-08
to fully automatic operation and adding detachable stocks. Carbine-type automatic weapons firing pistol rounds were developed during the latter stages of World War I by Italy, Germany
and the United States. Their improved firepower (800-1000RPM) and portability offered an advantage in trench warfare
, where most troops were issued bolt action rifles
, such as the Gewehr 98
In 1915, the Kingdom of Italy
introduced the Villar-Perosa aircraft machine gun
. It fired pistol-caliber 9mm Glisenti
ammunition, but was not a true submachine gun, as it was originally designed as a mounted weapon. This odd design was then modified into the OVP 1918
carbine-type submachine gun, which then evolved into the 9×19mm Parabellum Beretta Model 1918
after the end of World War I. Both the OVP 1918 and the Beretta 1918 had a traditional wooden stock
, a 25-round top-fed box magazine
, and had a cyclic rate of fire
of 900 rounds per minute.
The Germans initially used heavier versions of the P08 pistol
equipped with a detachable stock, larger-capacity snail-drum magazine
and a longer barrel
. By 1918, Bergmann Waffenfabrik had developed the 9 mm Parabellum MP 18
, the first practical submachine gun. This weapon used the same 32-round snail-drum magazine as the Luger P-08. The MP 18 was used in significant numbers by German stormtroopers
employing infiltration tactics
, achieving some notable successes in the final year of the war. However, these were not enough to prevent Germany's collapse in November 1918
. After World War I, the MP 18 evolved into the MP28/II SMG,
which incorporated a simple 32-round box magazine, selective fire
, and other minor improvements. Though the MP18 had a rather short service life, it was influential in the design of later submachine guns, such as the Lanchester
The .45 ACP Thompson submachine gun
had been in development at approximately the same time as the Bergmann and the Beretta. However, the war ended before prototypes could be shipped to Europe.
[Frank Iannamico, ''American Thunder: The Military Thompson Submachine Gun 1928, 1928A1, M1, M1A1'', Moose Lake Publishing, 2000.]
Although it had missed its chance to be the first purpose-designed submachine gun to enter service, it became the basis for later weapons, and was much more successful than the other submachine guns produced during World War I.
In the interwar period
, the "Tommy Gun" or "Chicago Typewriter" became notorious in the U.S. due to its employment by the Mafia
: the image of pinstripe-suited James Cagney
types wielding drum-magazine Thompsons caused some military planners to shun the weapon. However, the FBI
and other U.S. police forces themselves showed no reluctance to use and prominently display these weapons. Eventually, the submachine gun was gradually accepted by many military organizations, especially as World War II loomed, with many countries developing their own designs.
World War II
Changes in design accelerated during the war, with one major trend being the abandonment of complex and finely made pre-war designs like the Thompson submachine gun
to weapons designed for cheap mass production
and easy replacement like the M3 Grease Gun
As described above, the Italians were among the first to develop submachine guns during World War I. However, they were slow to produce them under Mussolini
; the 9 mm Parabellum Beretta Model 1938
was not available in large numbers until 1943. The 38 was made in a successive series of improved and simplified models all sharing the same basic layout. The Beretta has two triggers, the front for semi-auto and rear for full-auto. Most models use standard wooden stocks
, although some models were fitted with an MP40-style under-folding stock and are commonly mistaken for the German SMG. The 38 series was extremely robust and proved very popular with both Axis forces
and Allied troops
(who used captured Berettas). It is considered the most successful and effective Italian small arm of World War II.
In 1939, the Germans introduced the 9 mm Parabellum MP38
which was first used during the invasion of Poland
of September that year. However, the MP38 production was still just starting and only a few thousand were in service at the time. It proved to be far more practical and effective in close quarters combat than the standard-issue German Kar98K
bolt-action rifle. From this experience, the simplified and modernized MP40
(commonly and erroneously referred to as the Schmeisser) was developed and made in large numbers; about a million were made during World War II
. The MP40 was lighter than the MP38. It also used more stamped parts, making it faster and cheaper to produce.
[Military Small Arms of the 20th Century. 7th Edition. by Ian V. Hogg & John S. Weeks. Krause Publications. 2000. pages 118–120]
The MP38 and MP40 were the first SMGs to use plastic furniture and a practical folding stock,
which became standard for all future SMG designs.
During the Winter War
, the badly outnumbered Finnish used the Suomi KP/-31
in large numbers against the Russians with devastating effect.
Finnish ski troops became known for appearing out of the woods on one side of a road, raking Soviet columns with SMG fire and disappearing back into the woods on the other side. During the Continuation War
, the Finnish Sissi patrols
often equipped every soldier with KP/-31s. The Suomi fired 9 mm Parabellum ammo from a 71-round drum magazine (although often loaded with 74 rounds). "This SMG showed the world the importance of the submachine gun in modern warfare",
prompting the development, adoption and mass production
of submachine guns by most of the world's armies. The Suomi was used in combat until the end of the Lapland war
, was widely exported
and remained in service to the late 1970s.
In 1940, the Russians introduced the 7.62×25mm PPD-40
and later the more easily manufactured PPSh-41
in response to their experience during the Winter War against Finland. The PPSh's 71-round drum magazine is a copy of the Suomi's. Later in the war they developed the even more readily mass-produced PPS submachine gun
- all firing the same small but high-powered Tokarev cartridges. The USSR went on to make over 6 million PPSh-41s and 2 million PPS-43s by the end of World War II. Thus, the Soviet Union could field huge numbers of submachine guns against the Wehrmacht, with whole infantry battalions being armed with little else. Even in the hands of conscripted soldiers with minimal training, the volume of fire produced by massed submachine guns could be overwhelming.
In 1941, Britain adopted the 9 mm Parabellum Lanchester submachine gun
. Following the Dunkirk evacuation
, and with no time for the usual research and development for a new weapon, it was decided to make a direct copy of the German MP 28
. However this gun, the Lanchester, proved to be difficult and expensive to manufacture. Shortly thereafter, the simpler STEN
submachine gun was developed, which was much cheaper and faster to make. Over 4 million STEN Guns were made during World War II. Indeed, the STEN was so cheap and easy to produce that towards the end of World War II as their economic base approached crisis, Germany started manufacturing their own copy, the MP 3008
. After the war, the British replaced the STEN with the Sterling submachine gun
. Britain also used many M1928 Thompson submachine guns during World War II, but the cost of the Thompson was largely what prompted the development of the Sten.
The United States and its allies used the Thompson submachine gun, especially the simplified M1
. However, the Thompson was still expensive and slow to produce. Therefore, the U.S. developed the M3 submachine gun
or "Grease Gun" in 1942, followed by the improved M3A1 in 1944. While the M3 was no more effective than the Tommy Gun, it was made primarily of stamped parts and welded together, and so, it could be produced much faster and at fraction of the cost of a Thompson. Additionally, its much lower rate of fire made it a lot more controllable. It could be configured to fire either .45 ACP
or 9mm Luger
ammunition. The M3A1 was among the longest serving submachine guns designs, being produced into the 1960s and serving in US forces into the 1990s.
The Owen Gun
is a 9mm Parabellum Australian submachine gun designed by Evelyn Owen
in 1939. The Owen is a simple, highly reliable, open bolt, blowback SMG. It was designed to be fired either from the shoulder or the hip. It is easily recognisable, owing to its unconventional appearance, including a quick-release barrel and butt-stock, double pistol grips, top-mounted magazine, and unusual offset right-side-mounted sights. The Owen was the only entirely Australian-designed and constructed service submachine gun of World War II and was used by the Australian Army from 1943 until the mid-1960s, when it was replaced by the F1 submachine gun
. Only about 45,000 Owens were produced during the war for a unit cost of about A$30.
While most other countries during World War II developed multiple submachine guns, the Empire of Japan
had only produced one, the Type 100 submachine gun
, based heavily on the German MP28. Like most other small arms created in Imperial Japan, the Type 100 could be fitted with a bayonet
. It used the 8×22mm Nambu
cartridge, which was about half as powerful as a standard Western 9mm Parabellum round.
Production of the gun was even more inadequate: by the war's end, Japan had only manufactured about 7,500
of the Type 100, whereas Germany, America, and other countries in the war had produced well over a million of their own SMG designs.
Experience in close-range urban warfare
led to the German military desiring a weapon representing a compromise between the high fire volume of the SMG and the accuracy of a full-size rifle; after a false start with the FG 42
, this led to the development of the StG 44
select-fire Assault rifle
, the first weapon to be called such. In the years following the war, this new format began to gradually replace the submachine gun in military use to a large extent. Based on the StG44, the Soviet Union created the AK-47
, which is to date the world's most produced firearm
, with over 100 million made.
After World War II
After World War II, "new submachine gun designs appeared almost every week to replace the admittedly rough and ready designs which had appeared during the war. Some (the better ones) survived, most rarely got past the glossy brochure stage." Most of these survivors were cheaper, easier and faster to make than their predecessors. As such, they were widely distributed.
In 1945, Sweden introduced the 9 mm Parabellum Carl Gustav M/45
with a design borrowing from and improving on many design elements of earlier submachine-gun designs. It has a tubular stamped steel receiver with a side folding stock. The M/45 was widely exported, and especially popular with CIA operatives and U.S. Special Forces during the Vietnam War. In U.S. service it was known as the "Swedish-K". In 1966, the Swedish government blocked the sale of firearms to the United States because it supported North Vietnam
in the Vietnam War
. As a result, in the following year Smith & Wesson
began to manufacture an M/45 clone called the M76
In 1946, Denmark introduced the Madsen M-46, and in 1950, an improved model the Madsen M-50
. These 9 mm Parabellum stamped steel SMGs featured a unique clamshell type design, a side folding stock and a grip-safety on the magazine housing. The Madsen was widely exported and especially popular in Latin America, with variants made by several countries.
In 1948, Czechoslovakia
introduced the Sa vz. 23
series. This 9 mm Parabellum SMG introduced several innovations: a progressive trigger
for selecting between semi-automatic and full auto fire, a telescoping bolt
that extends forward wrapping around the barrel and a vertical handgrip housing the magazine and trigger mechanism. The vz. 23 series was widely exported and especially popular in Africa and the Middle East with variants made by several countries. The vz. 23 inspired the development of the Uzi submachine gun
In 1949, France introduced the MAT-49
to replace the hodgepodge of French, American, British, German and Italian SMGs in French service after World War II. The 9 mm Parabellum MAT-49 is an inexpensive stamped steel SMG with a telescoping wire stock, a pronounced folding magazine housing and a grip safety. This "wildebeast like design" proved to be an extremely reliable and effective SMG, and was used by the French well into the 1980s. It was also widely exported to Africa, Asia and the Middle East.
In 1954, Israel introduced a 9 mm Parabellum open-bolt, blowback-operated submachine gun called the Uzi
(after its designer Uziel Gal
). The Uzi was one of the first weapons to use a telescoping bolt
design with the magazine housed in the pistol grip for a shorter weapon. The Uzi has become the most popular submachine gun in the world, with over 10 million units sold,
than any other submachine gun.
In 1959, Beretta introduced the Model 12
. This 9 mm Parabellum submachine gun was a complete break with previous Beretta designs.
[Military Small Arms of the 20th Century. 7th Edition. by Ian V. Hogg & John S. Weeks. Krause Publications. 2000. pages 138–139]
It is a small, compact, very well made SMG and among the first to use a telescoping bolt design.
The M12 was designed for mass production and was made largely of stamped steel and welded together.
It is identified by its tubular shape receiver, double pistol grips, a side folding stock and the magazine housed in front of the trigger guard. The M12 uses the same magazines as the Model 38 series.
In the 1960s, Heckler & Koch
developed the 9 mm Parabellum MP5
submachine gun. The MP5 is based on the G3 rifle
and uses the same closed-bolt roller-delayed blowback
operation system. This makes the MP5 more accurate than open-bolt
SMGs, such as the Uzi. The MP5 is also one of the most widely used submachine guns in the world,
[Hogg, Ian (2002). ''Jane's Guns Recognition Guide''. Jane's Information Group. .]
having been adopted by 40 nations and numerous military, law enforcement, intelligence, and security organizations.
In 1969, Steyr
introduced the MPi 69
. This 9 mm Parabellum open-bolt, blowback-operated SMG has a telescoping bolt and is similar in appearance to the Uzi SMG.
[Military Small Arms of the 20th Century. 7th Edition. by Ian V. Hogg & John S. Weeks. Krause Publications. 2000. pages 97–98]
It has a vertical pistol-grip into which the magazine is inserted, a longer horizontal front grip area and a telescoping wire buttstock. The receiver is a squared stamped steel tube which partly nestles inside a large plastic molding (resembling a lower receiver) which contains the forward hand-grip, vertical pistol-grip and the fire control group
, making the MPi 69 one of the first firearms to use a plastic construction in this way. It has a progressive trigger and is also unusual among modern SMGs, as the MPi 69 is cocked by a dual-purpose lever also used as the front sling attachment point.
In the 1970s, extremely compact submachine guns, such as the .45ACP Mac-10
and .380 ACP Mac-11
, were developed to be used with silencers or suppressors
[Military Small Arms of the 20th Century. 7th Edition. by Ian V. Hogg & John S. Weeks. Krause Publications. 2000. page 166]
While these SMGs received enormous publicity, and were prominently displayed in films and television, they were not widely adopted by military or police forces.
These smaller weapons led other manufacturers to develop their own compact SMGs, such as the Micro-UZI
and the H&K MP5K
By the 1980s, the demand for new submachine guns was very low and could be easily met by existing makers with existing designs.
However, following H&K's lead, other manufacturers began designing submachine guns based on their existing assault rifle
patterns. These new SMGs offered a high degree of parts commonality with parent weapons, thereby easing logistical concerns.
In 1987, Colt
introduced the Colt 9mm SMG
based on the M16 rifle
The Colt SMG is a closed bolt, blowback
operated SMG and the overall aesthetics are identical to most M16 type rifles. The magazine well is modified using a special adapter to allow the use of smaller 9mm magazines. The magazines themselves are a copy of the Israeli UZI
SMG magazine, modified to fit the Colt and lock the bolt back after the last shot. The Colt is widely used by U.S. police forces and the USMC
In 1998, H&K introduced the last widely distributed SMG, the UMP "Universal Machine Pistol"
. The UMP is a 9mm, .40 S&W, or .45 ACP, closed-bolt blowback-operated SMG, based on the H&K G36
[Jane's Guns Recognition Guide. by Ian Hogg & Terry Gander. HaperCollins Publishers. 2005. page 192]
It features a predominantly polymer
construction and was designed to be a lighter and cheaper alternative to the MP5.
The UMP has a side-folding stock and is available with four different trigger group configurations. It was also designed to use a wide range of Picatinny rail
In 2004, Izhmash
introduced the Vityaz-SN
a 9 mm Parabellum, closed bolt straight blowback
operated submachine gun. It is based on the AK-74
rifle and offers a high degree of parts commonality with the AK-74. It is the standard submachine gun for all branches of Russian military and police forces.
In 2009, KRISS USA introduced the KRISS Vector
family of submachine guns.
Futuristic in appearance, the KRISS uses an unconventional delayed blowback system combined with in-line design to reduce perceived recoil
and muzzle climb
. The KRISS comes in 9 mm Parabellum,
.45 ACP, .40 S&W, 9×21mm, 10mm Auto, and .357 SIG. It also uses standard Glock
By 2010, compact assault rifles
and personal defense weapon
s had replaced submachine guns in most roles.
Factors such as the increasing use of body armor
and logistical concerns have combined to limit the appeal of submachine guns. However, SMGs are still used by police (especially SWAT
teams) for dealing with heavily armed suspects and by military special forces
units for close quarters combat, due to their reduced size, recoil and muzzle blast. Submachine guns also lend themselves to the use of suppressor
s, particularly when loaded with subsonic ammunition
. Variants of the Sterling
and Heckler & Koch MP5
have been manufactured with integral suppressors.
Personal defense weapons
Developed during the late 1980s, the personal defense weapon
(PDW) is touted as a further evolution of the submachine gun. The PDW was created in response to a NATO
request for a replacement for 9×19mm Parabellum
submachine guns. The PDW is a compact automatic weapon that uses specially designed rifle-like cartridges to fire armor-piercing bullet
s and are sufficiently light to be used conveniently by non-combatant and support troops, and as an effective close quarters battle
weapon for special forces
Introduced in 1991, the FN P90
features a bullpup
design with a futuristic appearance. It has a 50-round magazine housed horizontally above the barrel, an integrated reflex sight
and fully ambidextrous
[Kevin, Dockery (2007). Future Weapons. New York: Berkley Trade. .]
A simple blowback
automatic weapon, it was designed to fire the proprietary FN 5.7×28mm
cartridge which can penetrate soft body armor.
The P90 was designed to have a length no greater than an average-sized man's shoulder width, to allow it to be easily carried and maneuvered in tight spaces, such as the inside of an infantry fighting vehicle
The P90 is currently in service with military and police forces in over 40 nations.
[Tirans, Ivars (2009). "Baltic Defence Research and Technology 2009 Conference Proceedings". Military Review: Scientific Journal for Security and Defence (), Nr. 3/4 (132/133), p 103.]
Introduced in 2001, the Heckler & Koch MP7
is a direct rival to the FN P90. It is a more conventional-looking design, and uses a short-stroke piston gas system
as used on H&K's G36
assault rifles, in place of a blowback system traditionally seen on submachine guns. The MP7 uses 20-, 30- and 40-round box magazine
s and fires the proprietary 4.6×30mm
ammunition which can penetrate soft body armor. Due to the heavy use of polymers in its construction, the MP7 is much lighter than older SMG designs, being only with an empty 20-round magazine. The MP7 is currently in service with military and police forces in over 20 nations.
There are some inconsistencies in the classification of submachine guns.
[Military Small Arms of the 20th Century. 7th Edition. by Ian V. Hogg & John S. Weeks. Krause Publications. 2000. pages 93–94.]
British Commonwealth sources often refer to SMGs as "machine carbines".
Other sources refer to SMGs as "machine pistols" because they fire pistol-caliber ammunition, for example, the MP-40
, where "MP" stands for ''Maschinenpistole'' ("Submachine gun" in German, but cognate with the English term "Machine pistol"). However, the term "machine pistol
" is also used to describe a handgun
capable of fully automatic
or burst fire
, such as the Stechkin
, Beretta 93R
and the H&K VP70
. Also, Personal Defense Weapon
s such as the FN P90
and H&K MP7
are often called submachine guns.
In addition, some compact assault rifles
, such as the Colt XM177
, have been historically referred to as submachine guns as they served in the latter's role.
[Military Small Arms of the 20th Century. 7th Edition. by Ian V. Hogg & John S. Weeks. Krause Publications. 2000. pages 125 & 166–167.]
*List of submachine guns
*Overview of gun laws by nation
*Personal defense weapon
*Submachine gun competition
at the ''Encyclopædia Britannica
Category:Law enforcement equipment
Category:World War I weapons