Country of Origin: United States

Appears in: The US Army ACR competition of the late 1980s and early 1990s

Notes: The AAI ACR (also called the AAI Low-Impulse ACR, as part of the design includes an internal anti-recoil device) was based on AAI’s previous work during the SPIW program of the 1970s. The AAI ACR design presented for evaluation outwardly looked almost completely conventional, but was quite unconventional in many ways. Like all the other ACR candidates of the time, the AAI ACR was rejected by the US Army and became a museum piece.

The 18.5-inch barrel was tipped by a compact pepperpot-type muzzle brake; the bore used a very lazy twist rate (1:85), since the ammunition was essentially self-stabilizing. Most of the was of steel or light alloy, but the stock, fore-end, and pistol grip were of polymer/plastic construction using materials that were advanced for the time. (Early versions of the AAI ACR did not have a pistol grip, but instead a pistol grip wrist.) The fire selector used a 3-round burst mechanism that fired at a cyclic rate of 1800 rpm – so fast that the third round would be well downrange before the shooter would feel the recoil from the first round. The firing mechanism also fired from a closed bolt for semiautomatic fire and from an open bolt on burst; this optimized the AAI ACR for both aiming in semiautomatic fire and cooling in rapid burst fire. Strangely, though AAI’s round for its ACR had naturally low recoil, AAI decided use primarily mechanical means in the firing mechanism to limit dispersion of the rounds. Atop the receiver was a mount able to use most US and NATO optics and night vision equipment; in addition, AAI used an early version of Trijicon’s ACOG-type sights that are now so common on assault rifles and submachineguns today. This ACOG, though roughly twice as large as modern ACOGs, set the stage for future developments. The ACOG had 4x magnification and limited night vision, and even worked well at night. Standard adjustable iron sights were also developed, with the rear sight assembly being removable and fitting onto the receiver’s sight base, and a low sighting rib was also found above the barrel for quick shooting.

The ammunition that AAI used was based on flechette rounds developed well before the SPIW program. The muzzle velocity of the flechettes was very high (over 1400 meters per second), and the flechette had excellent penetration. The flechette (like most flechettes) twisted into a fishhook-shape upon striking a person, causing wounds out of proportion to the size of the flechette – so much so that it was briefly thought that AAI’s round might be a violation of the Geneva Accords. However, the AAI flechette was not without its problems; the long, finned, needle-like shape (about 1.6x41mm) together with its very light weight (about 0.56 grams) made it extremely susceptible to wind. The round, nestled in its casing and liquid-crystal boot, was almost identical in size to the 5.56mm NATO round, and the magazines themselves were based on M-16-type magazines. The AAI ACR could not fire 5.56mm NATO rounds, though – doing so would cause a chamber explosion, usually accompanied with the bolt assembly blowing backwards out of the weapon at high speed, possibly injuring or even killing its shooter. The M-16-based magazines were quickly modified before such an accident could happen so that one could not load 5.56mm NATO rounds into AAI ACR magazines and standard M-16-type magazines would not fit into the AAI ACR. (A 62-round drum was also developed for the AAI ACR, as the company planned to develop a whole family of small arms based on its ACR if the military decided to adopt it – including a SAW.) The problems with the ammunition were one of the main strikes against the AAI ACR; in addition, the (real-world) cost per round was very high.

Country of Origin: Czech Republic

Appears in: Czech weapon catalogs of the 1990s and early 2000s.

Notes: This weapon appears at first to be a reworked AK, but in fact employs a form of delayed blowback action similar to that of the Hungarian M-39 and M-43 submachineguns, instead of the gas operating system of the AK series. It is part of a series of weapons, including the B-20 battle rifle, the B-30 sniper rifle, and the B-40 grenade launcher. Versions of the B-10 were also designed in 5.56mm NATO caliber and 9mm Parabellum caliber (the latter mostly as a technology demonstrator). Unfortunately, the company involved was unable to produce any sales other a few used for countries to test them under local conditions, and they were apparently disappointed by the results (reportedly due the complexity necessary to make the weapon modular), and large-scale sales never materialized.  by 2006, the weapon had been withdrawn from sales.

Twilight 2000 Notes: This weapon was in very limited issue during the Twilight War, and for most of the war, its existence was regarded as only a rumor.

Merc 2000 Notes: Though not a big seller in the Czech or the Slovakian military, the B-10 was quite popular among several Southeast Asian and African nations who felt the need to replace their tired old AK-series weapons. (The modular nature of the weapon also helped in this regard.)

Country of Origin: US/Germany

Appears in: Experiments to replace the M-16 series in US service in the early to mid-2000s.

Notes: This weapon was designed to address the numerous flaws of the M-16/M-4 series, and to provide a sister weapon to the OICW. The XM-8 is derived from the rifle portion of the OICW, but does not have the grenade launcher or computerized sight attached. It is a modular construction weapon allowing the weapon to be modified for a variety of different uses and with a large amount of accessories and optics. The furniture is almost entirely made of high-strength polymer, and does not get hot to the touch like a metal rifle. It can also be molded with a variety of camouflage finishes. The XM-8 boasts an operation that does not foul as easily as the M-4/M-16, and can be stripped and cleaned much faster. Ambidextrous controls allow the weapon to be easily used by left or right handed shooters. The 3-round burst setting has been dispensed with (to be replaced with better training in fire control), and the weapon is issued with a day/night 3.6x optical sight integrated with a laser aiming module. There are mounts on all sides of the handguard and on top for virtually any sort of optic or accessory. The XM-8 was a Heckler & Koch invention, but in 2004, the rights to manufacture the XM-8 were acquired by Boeing in the US.

Five models of the XM-8 assault rifle are contemplated at present: the standard XM-8 Carbine, the XM-8 Compact carbine, two other XM-8s with 10-inch and 14.5-inch barrels, and a Designated Marksman (DMAR) version with a 20-inch barrel, bipod, and a higher-powered scope. The Compact Carbine can be used with or without a buttstock; both have a telescoping stock (which in the case of the Compact Carbine can be removed completely, reducing the weight to 2.23 kg). The two intermediate-length XM-8’s are being experimented with, but probably will not make the cut, though they may be built and issued in small number for special applications. The DMAR is not exactly a sniper rifle, but more a tactical sharpshooting weapon; while the standard "scope" of the XM-8 has no magnification, and is used only to increase efficiency of aiming, the DMAR has an actual 3.5x scope. The magazines are semitransparent polymer 30-round magazines. It was anticipated that the XM-8 would begin field tests in 2005, but the project was put on hold, and it's current status is sort "on again-off again." 

Twilight 2000/Merc 2000 Notes: This weapon does not exist in these timelines.

Country of Origin: Great Britain

Appears in: British Army weapon trials of 1949-50.

Notes: This rifle was developed to compete with the EM-2 and other weapons during the British Army weapon trials of 1949-50. As such, it fires what was supposed to be the new standard British military cartridge – the .280 British. The Model 28-P had a squared receiver incorporating an optical sight, but a rather conventional pistol-gripped half-stock similar to that of the US M-1 Carbine. The trigger mechanism was made deliberately heavier than required to slow the rate of fire. The flash suppressor could double as a grenade launcher (though it is not capable of launching modern-pattern rifle grenades). Unfortunately, testing showed that it was not a particularly accurate weapon (by the standards of the time); the Model 28-P also suffered breech explosion during testing. Though the breech design was revised and proved reliable, the Model 28-P was cut from the testing program. No more than 15 of these rifles were ever built.

Country of Origin: United States

Appears in: The US Army ACR competition of the late 1980s and early 1990s

Notes: Colt’s ACR was a result of the US military’s Advanced Combat Rifle (ACR) program. The Colt entry was based on the M-16A2; one can see the family resemblance, but the Colt ACR is still a greatly-modified version. Like the rest of the ACR candidates, the Colt ACR was rejected and they were placed in museums (I saw one on display at the Infantry Museum at Ft Benning) or taken back to Colt for further study.

The Colt ACR used an adjustable stock similar to the XM-177/M-4 carbine series, but with seven positions. The standard M-16A2 handguards were replaced with handguards with heavy heat shielding as well as a long sighting rib, used for short-range reflex shooting in the same manner as the rib on a shotgun. The 20.5-inch heavy barrel was tipped with new muzzle brake designed to be effective, compact and low-profile, yet allow for the use of rifle grenades and underbarrel grenade launchers. Fire controls were ambidextrous. The receiver was topped with a very early version of what became the MIL-STD-1913 rail; on this rail, an integral Leitz Wildcat 3.5x sight was meant to be mounted for troops who needed it, or it could be replaced with other US/NATO optics or a simple carrying handle with iron sights.

The ACR was specially designed to fire a new 5.56mm duplex round, which features two smaller-than-normal bullets point-to-tail. This increases hit probability (and effectively doubles rate of fire), but also significantly reduces effective range, as the two rounds are each much lighter and less stable. Standard 5.56mm NATO ammunition could still be fired from the Colt ACR, but the duplex rounds designed for the Colt ACR could not be fired safely from other 5.56mm NATO-firing weapons.

Twilight 2000 Notes: As this project was shelved several years before the Twilight War, it was largely a non-participant in the Twilight 2000 timeline. The Infantry Museum at Fort Benning had one that was taken along with most of the weapons, and it was put to use by US Army troops; in addition, at least 4 others were known to have been used during the war (all in the US). Duplex ammunition was extremely limited in quantity and the Colt ACRs were almost always used with standard 5.56mm NATO ammunition.

*The duplex round consists of two smaller bullets within one cartridge case instead of one standard-sized one. Upon achieving a hit upon a target, the firer will hit the target with at least one bullet. The second bullet will automatically hit at short range, hit 75% of the time at medium range, 50% of the time at long range, and 25% of the time at extreme or longer range. The damage listed is per individual bullet.

Country of Origin: United States

Appears in: Early 1970's Pentagon experiments.

Notes: This oddball variant of the M-16A1 was modified from a standard M-16A1 in 1974 to fire an experimental cartridge (essentially a standard 5.56mm NATO round necked down to 4.32mm). The idea was to further lighten the M-16A1 as well as the ammunition. This experimental M-16A1 was never given an official designation. The M-16A1 was simply rebarreled to fire the 4.32mm ammunition, and the bolt and chamber were also modified for the same purpose (in the case of the bolt, most of the modifications were in the bolt face; the bolt and bolt carrier assembly were otherwise almost a standard M-16A1 bolt carrier assembly). This experimental M-16A1 also had some other unusual features – the carrying handle was removed and replaced with a reflex collimator sight, barrel was tipped with a muzzle brake, and it used a 3-round burst setting in addition to a full-auto setting. (The 3-round burst setting was the only feature kept, and reappeared on the M-16A2 in a simplified form; however, a similar sight was used on the Colt ACR.)

30 of these rifles were so modified, and extensive field trials were done with them. Despite the fact that the objective of lighter weight was achieved, and the collimator sight made the modified M-16A1 quite accurate, the bullet was simply too light in weight, and was highly subject to long-range dispersion from wind due to that light weight; it also did not have the damaging potential of even the lightweight 5.56mm NATO round The cartridge and the rifle were therefore dropped from testing.

Country of Origin: United States

Appears in: Twilight 2000 First Edition Small Arms Guide, though I have embellished the story a little.

Fictional (Twilight 2000-Only) Notes: The M-16EZ is a crude copy of the M-16A1 issued to US militia units starting in 1999. They were built by both Milgov and Civgov so that their militia forces could have something that is better (and gives them more credibility) than deer rifles and shotguns. They are made from reconditioned parts that were originally tagged by the US military as too worn out for military use, and what newer parts were still available. They vary in quality and appearance, often having wooden stocks and handguards, telescopic sights, and other modifications limited only by imagination. Unfortunately, due to the generally poor condition of the parts involved, they also vary widely in reliability and performance. The figures given below are for an average M-16EZ.

(The M-16EZ could also be used in other Twilight 2000 campaign areas, or even in some Merc 2000 or Dark Conspiracy games, representing the sort of weapon that sometimes appears in various parts of the world -- a crude copy of an existing weapon built in local machine shops, or even someone's garage.)

Country of Origin: United Earth (?)

Appears in: Aliens 2

Notes: This is the signature weapon of the Colonial Marines in the sequel to Aliens, Aliens 2. It is a short barreled assault rifle that fires 10mm caseless explosive-tipped armor-piercing ammunition. The rounds are caseless chemically-propelled rounds; however, the primer is electrically-ignited. It uses a rotating breech mechanism and the barrel is free-floating, granting a bit more accuracy. The M-41A is constructed largely of what would be considered in our time exotic composites, such as carbon nanotubes. The weapon has a gyroscopic recoil compensator to help control recoil, as well as a conventional muzzle brake. On the side of the magazine well is a digital ammunition counter; this device counts the ammunition as it is being fired or reloaded in clear, easy-to read red LED numbers.

Of course, the assault rifle portion is only half the weapon. The M-41A includes a 30mm grenade launcher under the barrel for heavier work. This is a pump-action weapon which, though not designed for sustained fire use (it’s magazine holds only four rounds), it useful for quick explosive work.

Country of Origin: Great Britain

Appears in: British Army weapon trials of 1949-50.

Notes: This bullpup rifle, years ahead of its time, really looked for a short time like it was going to become the new infantry rifle of the British Commonwealth. It was a very unconventional rifle for its time; not only was it a bullpup weapon reminiscent of the much-later L-85 series, it fired a small, short cartridge – the .280 British round, developed specifically for the purpose. The weapon incorporated a carrying handle and an optical sight to increase aiming accuracy. Experience with bullpup-type rifles at the time was small, and there were initially some difficulties with an overly-complicated operating mechanism in its predecessor, the EM-1. (The EM-1 borrowed heavily from another rather complicated design, the Nazi Gerät 06, a gas-operated roller-locking experimental rifle designed by Mauser.)

Enfield then turned to a less complicated (but still rather modern) gas-operated system with flap locking, and instead of the stamped steel of the EM-1, returned to largely machined parts, which were more suited to British manufacturing methods of the time. Another modern feature was that the primary sight was a 1x reflex-type sight which could be replaced with a compact 3.5x sight, with backup iron sights. The EM-2 was ergonomically sound, well balanced with easy-to-reach controls and quite controllable in automatic fire. The EM-2 design worked quite well and was very reliable, and about the only thing that stopped its adoption by British armed forces was politics – in this case, the beginning of NATO, the demand for a common NATO round for its members’ rifles, and an absolutely intractable United States, who insisted on what would become the 7.62mm NATO round. The British briefly considered going its own way rifle-wise – The EM-2 even received the British Army designation of "Rifle, Automatic, No. 9 Mk 1" – and Belgium and Canada also produced experimental designs firing the .280 British cartridge. The US essentially bullied the rest of NATO into adopting the 7.62mm NATO cartridge.

Enfield tried converting the EM-2 to fire 7.62mm NATO, but the result was a rifle that (like most of the 7.62mm NATO rifles designed at the time) was uncontrollable in automatic fire. They then converted the EM-2 to fire only on semiautomatic, but the British Government, citing the costs and the length of the development program, decided to license a variant of the FN FAL (which became the L-1A1). Only 25 examples of the EM-2 were built in .280 British, plus the very few experimental 7.62mm NATO versions. I feel this is a shame, as the British would have had an exceptional assault rifle at least a decade before anyone else in NATO; in addition, the .280 British is a much better intermediate round than the 5.56mm NATO that we eventually ended up with. (In addition, this would not be the last time that the US would use political bullying to stop the British from fielding a superior assault rifle…)

Just for the heck of it, I included a 7.62mm version below, though I don’t even know if any examples of those experimental versions of the EM-2 even exist anymore.

Country of Origin: Great Britain

Appears in: Work leading to the current L-85A1 and L-85A2 rifles.

Notes: In 1960s, the British were (as many countries) looking for smaller, lighter assault rifles to replace their larger, bulkier battle rifles firing high-powered ammunition. The British MoD liked the compactness and light weight of the US M-16 series and its 5.56mm NATO round, but had also paid close attention to the numerous deficiencies of the M-16 series and its ammunition that were being revealed in Vietnam. The idea of a lightweight rifle firing small-caliber, high-powered ammunition was a good idea, but they felt they could do better. This led to the predecessor of the L-85, called the XL-64.

Enfield and the British MoD had always liked their EM-2 design (and rightly so). The bullpup design made for a compact, handy weapon, suitable for a variety of roles, from a cook who has it slung over his shoulder for emergencies to infantrymen on the attack. Enfield felt that improvements in ammunition propellant and bullet construction meant that they could use a far smaller round than that of the EM-2 – it wouldn’t be as powerful as the .280 British round, but could outclass the 5.56mm NATO. Radway Green, the company contracted to produce the ammunition, started with a necked-down and trimmed 5.56mm NATO case, eventually ending up with a 4.85x49mm round. (This round was very close in dimensions to the 5.56mm NATO round, and many 5.56mm-firing weapons could be easily converted to fire it using a kit that Enfield also intended to produce.)

The XL-64 could easily be mistaken for an early L-85 at first glance – because they are essentially the same weapons. (More on this later.) The XL-64 had been long in the design and finalization of its configuration, and it was the mid-1970s before it was revealed; trials didn’t even start until 1978. Once trials started, problems began immediately – and they were almost entirely political (and monetary) problems. Once again, the United States had already decided that the new version of the 5.56mm NATO round, the FN-designed SS-109, was going to be the new NATO standard assault rifle round, and weren’t interested in anyone else’s cartridge designs. (Of course, tons of money were also on the line.)

Enfield had realized almost from the beginning that the same thing that happened to their .280 British cartridge would almost certainly happen to their new 4.85mm round. Therefore, they designed into the XL-64 almost from its inception the capability to be easily converted to fire the 5.56mm NATO round and use M-16-type magazines. Though the SS-109 round was in its infancy when Enfield began working on the XL-64, only a few modifications were needed to accommodate the SS-109. That, and some more cost-cutting measures, morphed the XL-64 into the L-85.

One good thing did survive the XL-64 program – the SUSAT 3.5x light weapons sight. This compact scope would go to equip many L-85s, and draw the attention of the entire world.

Notes: The initial design work for the G-11 began in 1969, in response to a German Army request for a new rifle with a high first-round hit-probability, even when fired on automatic, yet would be light, compact, and extremely resistant to harsh climates. Many designs came and went, but by the late 1980s, Heckler and Koch presented the G-11 in final form. The G-11, though reportedly a very effective weapon, suffered from rumors that the ammunition could cook off, that it’s construction made maintenance difficult for both armorers and users, and that it’s looks and design were so exotic as to assault the sensibilities of traditional weapons. In addition, it did not fire 5.56mm NATO ammunition, which was a cardinal sin in NATO at the time. On top of this came the reunification of Germany, and the massive amounts of AKM and AK-74-type weapons the former East German Army already had available. Finally, the G-11 was going to be an expensive weapon to produce, and retooling for series production would take even more expense. By 2006, despite reports of very limited use by special operations forces in various countries, the G-11 is largely a curiosity piece, found mainly in museums or gun collections.

The G-11 was a revolutionary design, almost completely encased in plastic composites, with 50-round composite magazines that were sealed in plastic until they were loaded. Operation is by gas with a hint of blowback, with a cocking "dial" on the side of the stock and a fire selector above the pistol grip. Original G-11’s had selector settings for safe, semiautomatic, 4-round burst, and fully automatic. Once a magazine is loaded into the G-11 (slid into a track atop the handguard), the rounds face downward, and rounds are pushed downwards into the breech/chamber. The breech/chamber then rotates 90 degrees to line up with the 21.26-inch barrel. The cocking "dial" does not move when the G-11 fires, and can also be used as a decocker. The magazine moves back and forth in its track as the rifle fires; this actually helps dampen recoil, along with some other recoil-dampening mechanisms inside the G-11. When firing on full automatic, the cyclic rate is rather slow, at about 600 rpm; but when on burst, the cyclic rate rises to over 2000 rpm – so fast that the fourth round is well downrange before the recoil from any of the rounds is felt. (This kind of burst feature served as a model for future burst-firing weapons, and is now quite common on such weapons.) This makes bursts extremely accurate and virtually immune to barrel climb. There is, of course, no spent case ejection, but dud rounds are automatically ejected from a port with a hinged cover under the "receiver." This port closes again after the round is ejected. The "receiver" is topped with a carrying handle that contains a simple 1x aiming tube with a Mil-Dot reticule, with provisions for the removal of this aiming tube and replacement with a special 3.5x scope or certain other optics. The G-11 is also a very compact assault rifle, only a little over 29.5 inches long, despite the length of its barrel. The barrel is tipped by a cylindrical flash suppressor. The original version of the G-11 had no provision for the mounting of a bayonet, but this was quickly rectified.

Heckler & Koch went through a number of prototypes over the intervening years, but the initial production model was supposed to be the G-11K2; this model used 45-round magazines, but there were three mounted above the handguard (which was also larger, rounded on the bottom, and otherwise rather squarish). (The G-11K2 is still capable of being loaded with the original 50-round magazines, but they will not fit into the spare magazine tracks on the sides of the loaded magazine.) One of these magazines was to be carried inserted into the rifle, with the other two on separate tracks on either side of the inserted magazine to allow for quick magazine changes. The three magazines were carried lower on the top of the handguard than on the original G-11. A locking slot for a special bayonet was added, and the cylindrical flash suppressor was replaced by semi-flash suppressor combined with a muzzle set well back from the front of the weapon, effectively doing the same job. The carrying handle was replaced with one which could be completely removed, with a mount for various NATO-compatible optics. (A future modification was to include a length of MIL-STD-1913 rail.) The burst setting was changed from four to three rounds, to simplify the fire mechanism. A number of other mechanical and ergonomic modifications were also carried out, and the shape of the G-11K2 is very different from that of the original G-11.

Of course, the most revolutionary aspect of the G-11 is its ammunition, which is caseless. The bullet and combustible primer is embedded in a block or propellant, and nothing needs to be ejected after firing; there is no spent brass. The ammunition is therefore extremely light in weight and compact in size, allowing for a large magazine capacity without undue weight or magazine size. (I personally think this sort of ammunition for small arms may be the wave of the near future, but that’s just my opinion.)

When the US military announced its competition for the ACR (Advanced Combat Rifle), Heckler and Koch sent some G-11K2s for that competition, where it picked up monikers like "space rifle" and "plastic plank," despite the fact that the troops testing the G-11 liked its performance and compact size. However, the US military had such a large investment in M-16-type weapons, and especially in the 5.56mm NATO cartridge, at the time of testing, which was probably the biggest reason for its ultimate rejection.

Twilight 2000 Notes: Production of the G-11 began very rapidly in 1990, and just as quickly slowed in 1991; by 1994, Heckler & Koch were concentrating on the G-41 and then-upcoming G-36. Despite some 20,000 examples of the G-11 being made, by 2000, most of them had been discarded as pre-war stocks of ammunition were largely expended and new stocks were almost impossible to make using the production methods available by 2000.

Merc 2000 Notes: This is a popular weapon for special ops forces operating in harsh climates. If you encounter a force armed with the G-11, they are probably clandestine forces of a large national government or of someone who has a lot of money to spend on exotic weapons and ammunition.

Appears in: Work leading to the AK-47 assault rifle.

Notes: There have been a lot of prototypes, experimental versions, and variants of the AK series from Soviet and Russian designers over the years. Many of them failed or were never adopted, for a variety of reasons – they didn’t work, they were too complicated, they were technologically infeasible at the time of their inception, the improvements weren’t necessary, too complex, or too expensive, their designers were not in political favor at the time, etc. Some of them were good, solid weapons, some sucked, and some were quite interesting. This entry will describe some of these variants and put them into game terms.

There is much evidence that work on the rifle that became the AK-47 may have started as early as late 1943 (most experts believe Kalashnikov started with captured Nazi StG-44s, though Mikhail Kalashnikov himself insisted until his death that his was an original, independent design, with no influence from any other weapon). However, the first prototype of the AK-47 that is generally known was actually the AK-46 No. 1 of 1946. The AK-46 No. 1 fired the predecessor of the current 7.62mm Kalashnikov round, which is generally called the 7.62x41mm Kalashnikov or 7.62x41mm M-1943 (both cartridges were designated by the Russians the M-1943). The AK-46’s design was quite similar to that of the AK-47, though the receiver has features reminiscent of the StG-44 – it actually looks like a sort of blend of the StG-44 and AK-47. Unlike the AK-47, the AK-46 used a gas piston and rod assembly that are separate from the bolt carrier. The pistol grip is actually made of a steel frame with thick wooden grip plates. The 15.63-inch barrel was ported with 3 holes on either side of the barrel, just behind the front sight assembly – a feature later dropped, reportedly as a cost-cutting and manufacturing time-saving measure. (The front sight assembly actually sits directly above the muzzle.) The safety and selector switch were separate, and located on the left side of receiver above the trigger. Ironically, the receiver was made of stamped steel instead of milled and machined steel, in order to make the AK-46 lighter and cheaper to produce – a feature that would not be found on production AK rifles until the introduction of the AKM.

Prototypes rapidly moved along to the AK-46 No. 2 version. Though for the most part similar to the No. 1, the No. 2 changed to a sectional receiver built out of a combination of stampings that are welded and/or riveted as necessary. (This made production easier and cheaper, but led to a somewhat weaker receiver assembly.) The charging handle could be detached from the bolt carrier in order to prevent it from being caught on equipment, clothing, or other possible snags; the AK-46 No. 2 could still be operated with the charging handle removed by a finger hole in the bolt carrier face (similar to that of the M-3A1 Grease Gun submachinegun). The barrel porting was deleted, and the handguards and gas tube made shorter. The barrel length was increased to 17.72 inches, though it included a substantial length of unprotected barrel from the end of the gas block to the muzzle – and the barrel itself is of a rather narrow cross-section, leading one to believe that bending could be a problem. The AK-46 No. 3 is based on the No. 2, but has a forward-folding stock of the type found on the later AKS-47 and AKMS; in addition, the barrel length is reduced to 15.75 inches.

The first AK-47 prototype, the AK-47 No. 1, was still chambered for the 7.62x41mm cartridge. In external appearance, it looked more like the AK-47 we all know and love, though the stock had more of a drop and the handguards looked a bit lumpish. The barrel length remained at 15.75 inches, but the barrel porting reappeared. The gas piston and rod assembly assumed their current form, integral with the bolt carrier, joined by a threaded portion and secured by a pin. The receiver of the AK-47 No. 1 was once again made of stamped steel, with a chamber extension to ensure a proper fit with the barrel. Changes were made to the operation to make locking more reliable and case extraction simpler and more reliable. The safety and fire selector were relocated to the now-familiar position on the right side, with a paddle switch almost identical in shape to production AK-series weapons. The gas system did not have the regulator of production AKs.

The AK-47 No. 2 prototype lengthened the barrel somewhat to 15.94 inches, and the barrel porting was replaced by a two-chamber muzzle brake; the front sight assembly was moved behind this brake. (The barrel length does include this brake; the nominal length of the barrel was still 15.75 inches.) The assembly was also of stronger construction. The handguards were a bit shorter. The structure of the front end of the gas tube and the gas block are rather striking – they look almost identical to those of the StG-44. There were two brass strips on the right side of the receiver near the front; these were used to mount various vision devices for testing purposes. The stock had a slightly-raised cheekpiece and much less of a drop than the AK-47 No. 1; the wood of the pistol grip was checkered. The AK-47 No. 3 was virtually identical to the No. 2, but the end of the gas tube and gas block assumed their now-familiar shape, and the two-chamber muzzle brake was replaced by two simple, oval shaped barrel ports. The AK-47 No. 4 was basically the same weapon as the AK-47 No. 3, but used the same folding stock as the AK-46 No. 2. The AK-47 No. 5 is the AK-47 No. 4, but without the barrel porting, and a few other measures to lighten the weapon.

The AK-48 No. 1 and No. 2 were the last prototypes of the AK-47 before the rifle that is known today as the AK-47 began mass production (which began in late 1948, with first issues to units starting in mid-1949). These prototypes were generally in the same form as the production AK-47 and AKS-47; the No. 1 corresponded to the production AK-47 and the No. 2 the production AKS-47. The ammunition had been revised, and both examples of the AK-48 fired what is now called the 7.62mm Kalashnikov round. The barrel assumed the length of production AK-47s – 16.34 inches. However, while the barrel porting was deleted, the muzzle was threaded to allow the attachment of various muzzle devices, including silencers and suppressor, muzzle brakes, or even an adapter for use with a possible (at the time) vehicular firing port that might be later developed. The No. 2 used a folding wire stock, though it was simplified in construction over the folding stock used on the other AK-47 prototypes.

Appears in: The Twilight 2000 v1's Small Arms Guide and V2/2.2's Infantry Weapons Handbook.

Notes: This weapon was never produced in the real world, at least not officially, though it is possible that some early AK-74s were in fact modified AKMs. Any such weapons, however would still be of better quality than a hypothetical AKMR.

Twilight 2000 Notes: Early in the Twilight War, the Russians and some of its Eastern European allies had a problem: they had invested heavily in the new 5.45mm Kalashnikov round, but production of the AK-74s to fire them was seriously lagging. At the same time, there were large amounts of AK47s and even AKMs that were no longer mechanically reliable due to wear. The decision was made to "fix" those old rifles; they were rebarrelled and rechambered to accept 5.45mm Kalashnikov ammunition and the new magazines designed for it, other worn out parts were sometimes replaced, and rotting wooden stock were replaced with new ones (or sometimes even ones made of plastic or fiberglass). These weapons were then issued back out to the hoards of Category III, Mobilization only, and militia units being raised. The "AKMR," as the weapon was dubbed, was regarded as being unreliable compared to the average AK series weapon, and modification standards were generally poor and got poorer as the war went on. Depending on the base weapon, a soldier might either be issued a standard AKMR or a folding stock AKMRS.