Submachine gun A submachine gun ( SMG ) is an automatic carbine , designed to fire pistol cartridges . It combines the automatic fire of a machine gun with the cartridge of a pistol . An assault rifle , in contrast , uses an intermediate - power cartridge with more power than a pistol but less than a standard rifle or battle rifle . Models . H & K MP9 10mm SMG . It is considered to be one of the finest weapons in the world . The single shot is acceptable , comparable to the 6520 pistol , but the burst mode is excellent . The MP9 is easy to control , and can dish out punishment unlike any other firearm in its size category . Consequently , it is highly popular among people requiring a powerful but compact source of firepower with low maintenance requirements . This weapon is vital amongst freelance - mercs as it can spew death at close range . It is an excellent weapon early in the game and can shred unarmored foes . It is very deadly at close range . Ammunition can be found almost anywhere . M3A1 " grease gun " SMG . < section begin = " grease " / > This submachine gun filled National Guard arsenals after the Army replaced it with newer weapons . However , the " Grease " gun was simple and cheap to manufacture so there are still quite a few still in use . It ' s very powerful , but its . 45 rounds lack the bonuses of 10mm rounds . < section end = " grease " / > Thompson M1928 . < section begin = " Tommy gun " / > This Thompson M1928 submachine gun is a sinister looking weapon ; every time you hold it , you have an urge to put on a fedora hat and crack your knuckles . The Thompson is well - fed by a large 50 round drum magazine . Like the Grease gun , the Thompson is pretty powerful , but fires nondescript . 45 rounds . < section end = " Tommy gun " / > H & K P90c . < section begin = " H & K P90c " / > The Heckler & Koch P90c was just coming into use at the time of the war . The weapon ' s bullpup layout , and compact design , make it easy to control . The durable P90c is prized for its reliability , and high firepower in a ruggedly - compact package . < section end = " H & K P90c " / > Unnamed 10mm SMG . This 10mm SMG is most effective at close - range by unleashing a hail of bullets . However , the SMG is next to useless at longer ranges . The SMG simply has too much spread to be of much use beyond close - range combat . Another downfall of the SMG is its ammunition consumption ; if ammunition is not properly managed , the SMG can eat through 10mm rounds at alarming speeds . Even so , it ' s a common weapon that packs a nasty punch ; a very valuable thing . Unnamed 9mm SMG . < section begin = " 9mmSMG " / > The 9mm SMG is a decent small weapon , emptying its full magazine in 3 seconds flat . < section end = " 9mmSMG " / > Unnamed 12 . 7mm SMG . More common in higher levels , the 12 . 7mm submachine gun is a heavy duty large caliber SMG . It features a unique top mounted magazine , the bullets lie at a right angle to the weapon . Silenced . 22 SMG . The silenced . 22 SMG is iconic with its unusual pan magazine , which sits atop the gun rather than under . The silencer is integrated right into the barrel . Unnamed . 45 Auto SMG . < section begin = " . 45 Auto SMG " / > Used by the tribes in Zion Canyon and the Triggermen of The Commonwealth , the . 45 Auto SMG is a relatively robust gun that offers heavy firepower . Unfortunately , the result is that this gun requires two hands to operate . Also , the heavy recoil means that this SMG cannot be used by frail individuals and accuracy will suffer in long - distance engagements . < section end = " . 45 Auto SMG " / > MP5 H & K . < section begin = " mp5 " / > The MP5 H & K is a submachine gun of German design , developed in the 1960s by a team of engineers from the German small arms manufacturer Heckler & Koch GmbH . It ' s one of the most popular submachine guns , used by law enforcement and militaries all over the world . < section end = " mp5 " / > UZI . < section begin = " uzi " / > The Uzi was designed by Major Uziel Gal in the late 1940s . The prototype was finished in 1950 ; first introduced to IDF special forces in 1954 , the weapon was placed into general issue two years later . The Uzi has found use as a personal defense weapon by rear - echelon troops , officers , artillery troops and tankers , as well as a frontline weapon by elite light infantry assault forces . < section end = " uzi " / > Scorpio . < section begin = " Scorpio " / > The Skorpion vz . 61 is a decent enough little Machine pistol . Once used by members of the Spetznas , it ' s not as great a gun as the MP5 . < section end = " Scorpio " / > Sten gun . < section begin = " sten " / > The Sten Gun was developed by the British during WWII as a cheap alternative to the more expensive Thompson SMG offered by the Americans . The Sten proved to be extremely reliable and , due to its fairly loose tolerances , could perform in poor conditions much more reliably than ostensibly better weapons . < section end = " sten " / > MP38 . < section begin = " mp38 " / > The MP40 was created during World War II by the German army , who need a compact weapon that provided more firepower than a simple pistol to arm its paratroopers , tank crews and officers . This weapon was immediately so successful that the Army established an ombudsman to all its troops . < section end = " mp38 " / > Walther MPL . < section begin = " Walther " / > The Walther MPL is a parabellum submachine gun produced in West Germany from 1963 to 1985 by Walther . It serves as a slightly better all - around SMG , compared to the MP5 . < section end = " Walther " / > FN P90c . < section begin = " FN P90c " / > The FN P90c was designed by the FN Herstal and just coming into use at the time of the war . The weapon ' s bullpup layout , and compact design , make it easy to control . The durable P90c is prized for its reliability , and high firepower in a ruggedly - compact package . < section end = " FN P90c " / > Calico Liberty 100 . < section begin = " Calico " / > The Calico Liberty 100 is a SMG manufactured by Calico Light Weapons Systems . Mostly known for it ' s unusual magazine , and it ' s unreliability . < section end = " Calico " / > Home - made machine gun . < section begin = " HomeMadeMachineGun " / > It ' s a jury - rigged 9mm submachine gun with an improvised bayonet built from scrap metals paired in some places with pieces of tissue and crafted in the workshops of Jane ' s raiders in Carbon Mill Texas in 2208 . < section end = " HomeMadeMachineGun " / > Unnamed 9mm model . < section begin = " unamedfobos " / > A classic 9mm SMG . < section end = " unamedfobos " / > Rheinmetall 9mm machine pistol . Manufactured by Rheinmetall AG , this 9mm machinepistol is capable of one - handed use for both single shot and burst attacks . Though it is wildly inaccurate , its potential for loads of short - range damage is high .