Assault rifle An assault rifle is a selective fire rifle that uses an intermediate cartridge and a detachable magazine . Assault rifles are the standard infantry weapons in most modern armies . Assault rifles are categorized in between light machine guns , which are intended more for sustained automatic fire in a light support role , and submachine guns , which fire a pistol cartridge rather than a rifle cartridge . Models . AK - 112 assault rifle . < section begin = " AK112 " / > The AK - 112 assault rifle is a military assault rifle of Soviet origin that was in service during the early 21st century . Chambered for 5mm ammunition , it utilizes a 24 - round magazine . The AK - 112 was eventually considered aged and was scheduled to be replaced just prior to the Great War . < section end = " AK112 " / > AK - 112 assault rifle expanded magazine . The AK - 112 assault rifle with an extended , military sized , 100 - round magazine modified by a qualified repairer with proper tools . H & K G11 . < section begin = " G11 " / > The H & K G11 is an assault rifle developed during the late 1960s by Heckler & Koch . It has revolutionized assault weapon design and fires 4 . 7mm caseless , a cartridge consisting of a block of propellant with a bullet buried inside . The loading and feed mechanism is physically very complicated but exceptionally fast and reliable . Rounds are fed into the weapon from a magazine that lies above and parallel with the barrel . The rounds are oriented vertically ( at 90 degrees to the bore ) and are fed downwards into the rotary chamber so that they can be rotated 90 degrees for firing . Because the H & K G11 uses caseless ammunition , there are no extraction and ejection steps . The resultant weight and space savings allow the H & K G11 to have a very high - capacity , 50 - round magazine . < section end = " G11 " / > H & K G11E . The H & K G11E is a new version of the standard H & K G11 , equipped with a low - light scope , an extended barrel and an electronic regulator on the left side . It also has a better firepower and rate of fire . XL70E3 . The XL70E3 was an experimental assault rifle developed in the late 21st century just before the Great War . It is equipped with a scope , fires 5mm ammunition and utilizes a 20 - round magazine . Manufactured , primarily , from high - strength polymers , the XL70E3 is almost indestructible . It is light , fast firing , accurate , and can be broken down without the use of tools . R91 assault rifle . < section begin = " R91 " / > The R Series of combat assault rifles was used reliably following the discontinuation of the M Series in the early 21st century . The R series , produced by civilian manufacturer Stent Security Solutions , was made in many models and variations . The variation most common to Washington , D . C . , was the R91 full - auto urban assault rifle . The R91 assault rifle was issued in the United States Armed Forces during the urban pacification operations and combat . Since the National Guard had been fully deployed around the DC area during the time of the Great War , the R91 is readily available for those willing to search around this area . Although nearly two centuries of scavenging has reduced the numbers of working units , the R91 remains a favorite of slavers , raiders , and mercenaries in the Capital Wasteland . < section end = " R91 " / > Type 93 Chinese assault rifle . < section begin = " Chinese " / > The Type 93 Chinese assault rifle was designed and manufactured by a Chinese industrial conglomerate for the People ' s Liberation Army during the Resource Wars , for the purpose of equipping the Chinese infiltrators and American fifth - columnists . To this end , it was chambered for the abundant 5 . 56mm round and utilizes a 24 - round magazine . Thousands of these weapons were smuggled into the US for use by Chinese operatives and sympathizers on the East Coast , and many remain functional even two hundred years after the Great War . These rifles are also proven to be ready for manufacturing in post - War conditions . < section end = " Chinese " / > Infiltrator . < section begin = " Infiltrator " / > The Infiltrator is a silenced and scoped assault rifle . Its appearance consists of a black paint finish , a scope , and is basically a shortened and stock - less variant of the R91 assault rifle that was standard - issue in the United States Armed Forces at the time of the Great War . Based on its name , it was probably created to be used for special operations groups . The Infiltrator fires 5 . 56mm round and utilizes a 24 - round magazine . Despite its scope , the Infiltrator still suffers from the typical inaccuracy of assault rifles at long - range combat , limiting its suitability only for short and middle - range combat . It is one of the favorite weapons of the Pitt raiders in The Pitt and in 2281 , is known for having one in his collection of his secret arsenal in Freeside . < section end = " Infiltrator " / > Unnamed assault carbine . This assault carbine is a compact automatic rifle with a high rate of fire and a comparatively low spread . It sports a very compact size , fires 5mm round and utilizes a 24 - round magazine . It is very accurate for an automatic weapon and highly effective against medium or heavily armored targets . Unnamed assault rifle . This assault rifle is a long , cylindrical - barrel design which does not resemble any past version . It features a side - fed magazine which houses 30 5 . 56mm rounds ( can be upgraded to hold up to 80 ) , and is available in either semi - automatic or fully automatic variations . It offers immense recoil control and remains very easy to keep under control , even when fully automatic . AK - 47 . The AK - 47 is a selective - fire , gas - operated assault rifle developed in 1944 by Izhmash . It fires 7 . 62mm and utilizes a 24 - round magazine . The main advantages of the AK - 47 is its simple design , fairly compact size , inexpensive to manufacture , and easy to clean and maintain . The large gas piston and tapered cartridge case design allow the gun to endure large amounts of foreign matter and fouling without failing to cycle . The bore and chamber , as well as the gas piston and the interior of the gas cylinder , are chromium - plated , dramatically increasing the life of these parts by resisting corrosion and wear . As each bullet travels through the barrel , a portion of the gases expanding behind it is diverted into the gas tube above the barrel , where it impacts the gas piston . The piston , in turn , is driven backward , pushing the bolt carrier , which causes the bolt to move backwards , ejecting the spent round , and chambering a new round when the recoil spring pushes it back . Its reliability , ruggedness and accuracy have earned it the reputation of being the best assault rifle ever made . M16A1 . The M16A1 is an assault rifle developed in 1967 by Colt . The intention was to create an innovative firearm design that incorporated many of the new materials being used in aerospace design . The M16A1 is composed of durable aluminum alloy and hearty plastic , fires 5 . 56mm with a 24 - round magazine . The M16A1 also has distinctive sights , consisting of a simple round screw - in front sight post . Through the years , it remained a very reliable assault rifle and was the standard rifle used by the US Army from 1970 and during the middle part of the 20th century , succeeding the M - 14 . Ruger AC556F . The Ruger AC556F , created in the 1970s by Ruger , is a development of the Ruger Mini - 14 , an old assault rifle originally used only by police forces . The Ruger AC556F replaced it and was marketed for military and law enforcement use . It has a reflex scope , fires 5 . 56mm with a 20 - round magazine . As a heavy - duty automatic weapon , the Ruger AC556F was designed to for rough handling in the militaristic environments of combat zones or in pulling security duties . Steyr AUG . The Steyr AUG is a bullpup assault rifle created in 1977 by Steyr Mannlicher . It ' s a selective fire weapon with a conventional gas piston operated action that fires from a closed bolt . It uses 5 . 56mm with a 40 - round magazine . Designed as a rifle that could be quickly adapted to a wide variety of roles , the Steyr AUG is a modular configuration rifle that employs a high level of polymer and advanced alloy components , consisting of six main assemblies : the barrel , receiver with integrated telescopic sight , bolt and carrier , trigger mechanism , stock and magazine . Vault - Tec assault rifle . A post - War scoped assault rifle designed by Vault - Tec in the Secret Vault . The Vault - Tec assault rifle fires 9mm rounds , has a vertical foregrip , a good rate of fire and fires bullets with great accuracy . Mentioned and cut content . M199 assault rifle . Perhaps the most well - recognized weapon in the pre - War U . S . Military arsenal , the M199 earned its nickname " The Backtalker " from the unusual report the firing mechanism makes as it ejects a spent shell . Firing standard 5 . 56mm rounds , the M199 was the official infantry weapon of the U . S . Army . AKA - 47 . Dependable , reliable , and trusty ! You can always count on your AKA - 47 . It never lets you down and always keeps firing , regardless of conditions . Unnamed 5mm assault rifle . The assault rifle uses 5mm ammunition and comes with a scope . Unnamed 7 . 62mm assault rifle . An assault rifle that could be obtained and used by the Prisoner is also present in Van Buren tech demo .