Experimentation, use, and variants of the Russian AKS74U

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Earlier on TFB we covered the origins of the name Krinkov, and the fascinating etymology of the word from Afghan Mujahdeen fighters, to the gun markets of Dharra, and then on to how we use it today via “Krink”. In this piece, we’ll look at some of the finer operational details of the original Russian design, through experimentation, use, and some of the variants that came into play.

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The original design by Tkachev. Courtesy Maxim Popenker, “History of Russian avtomat” by S.Monetchikov.

To start things off, the development of the AKS74U almost ran concurrent with development of the AK74 service rifle, and the concept for an extremely compact submachine gun firing an intermediate cartridge was actually put into place before the 5.45x39mm round ever came into the picture. A Russian small arms designer by the name of Peter Andreevich Tkachev developed an Uzi like compact assault rifle, based around the round that the 5.45 was based on, the 5.6x39mm cartridge. The compact assault rifle had a magazine as the pistol grip itself, behind the trigger. The folding stock was meant to fold on top of the weapon, while there were wooden handguards wrapped around the barrel. This was in the 1960s and early 70s, wherein the concept was there, but a reliable firearm and cartridge wasn’t. It was called the AO-46, and never moved past the experimental stage.

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One of Kalashnikov’s earlier designs. Courtesy Maxim Popenker, “History of Russian avtomat” by S.Monetchikov.

In 1973 when development of the AK74 was really taking off, the project was given new life, under a project that was code named “Modern”, headed by the Ministry of Defence Industry and Main Missile and Artillery Directorate (GRAU). The intention was to create a submachine gun that specialists within the infantry could use to compliment their primary weapon system. RPG gunners, vehicle crews for example. It was also conceived as a special purpose weapon for the Russian Special Forces, the Spetsnaz. One of the stipulations was that the weapon could not protrude outside of the width of a full packed soldier while in the field.

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Stechkin’s contribution. Courtesy Maxim Popenker, “History of Russian avtomat” by S.Monetchikov.

The project called for various design bureaus in the Soviet Union to submit their designs for testing. A number of very prominent designers came up with prototypes, Stechkin, Dragunov, Simonov, and of course Kalashnikov. Bear in mind that all these designers headed up a team of engineers that would actually work on the details of the weapon system. The final prototype would come from their overall command. Similar to how Eugene Stoner perfected the AR15 while under the leadership of George Sullivan back in the 1960s.

Simonov's AG-043 entry into the competition.

Simonov’s AG-043 entry into the competition.

The ultimate winner in the experimental trials was from the Kalashnikov bureau. Kalashnikov’s design relied heavily on parts from the then current production of the AKS74, the new service rifle in Soviet service. Further work progressed on the design under the leadership of a certain S.N. Furman at the Izhevsk arms factory. The largest problem that all of the experimental prototypes had, to include the winning Kalashnikov one, was the muzzle device. Working with a barrel already shortened to around 8 inches and having to cut down the gas piston, many of the designs had issues trapping enough gas to work the action of the submachine guns piston gas system reliably enough. Thus, a sort of gas expansion chamber was fitted, and this is the bulbous muzzle device that the AKSU is so easily identified by. The problem of the muzzle device wasn’t actually solved until around 1982, when the threads and internal design of the muzzle device were altered due to problems found with excessive use of the AKSU in Afghanistan. One of the other alterations made to the design was increasing the rifling twist from the original AK74 twist rate. This was to increase stability but nowadays it is one of the biggest downfalls of rebuilding these weapons, because people try to work with standard AK74 barrels and it just doesn’t work.

Kalashnikov's winning design.

Kalashnikov’s winning design. “Kalashnikov” by S.Fedoseev

One of Kalashnikov's earlier designs.

One of Kalashnikov’s earlier designs. Courtesy Maxim Popenker, “History of Russian avtomat” by S.Monetchikov.

Work progressed, and in 1976 the first field trials were held in the town of Kirovabad, today known as Ganja in modern day Azerbaijan, just north of the Iran, and east of Turkey (the town changed its name back to Ganja in 1989, as the Soviet Union was crumbling). The tests were with a Soviet motorized Infantry division, and an Airborne division. The military district this occurred in was the Transcaucasian Military District in Azerbaijan, and another source states that trials might have continued until March of 1977. Finally, in 1979, the prototype was officially adopted as the “5,45-ммАВТОМАТЫ
КАЛАШНИКОВААК74”, with the formal abbreviation as “AKC74U”, the U standing for “Ukorochennyj”. Essentially it means, “The short AK74, that is further shortened”. The GRAU code for the gun, which is similar to the NSN number in the United States, was “— 6P26”. Manufacture initially began at the Izhevsk arms factory, where then current production of the AK74, and AKS74 was taking place. However, production was later moved to the Tula arms factory in late 1981 or early 1982. Examples made at Izhevsk are extremely rare today and are mostly in museums. Current parts builds in the U.S. are for the most part all Tula parts kit imports, and most are from 1986 or onwards.

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Experimental plastic handguards from 1986.

Experimental plastic handguards from 1986.

As mentioned previously, one of the design concepts for the AKSU was to be a primary weapon system of the Spetsnaz. The Soviet designers had an absolute ball with this process and put everything from an M203 like suppressed grenade launcher underneath the handguards, to actual suppressors and different variants of infared night sights that are absolutely massive. The early suppressor design was extremely bulbous, while later on the design changed to a standard AK74 design that was much more straight lined in comparison of profiles. However, herein lies one of the biggest conundrums of small arms design, and that is the working gap of knowledge between the actual designers and the actual end users. The Spetsnaz took a look at the AKSU and actually wanted nothing to do with it. The inherent inaccuracy past 100 meters, and the overheating of the short handguards, combined with the large muzzle flash made it a poor combat rifle at the distances that the Spetsnaz were using it with. Primarily this was in Afghanistan, as the Soviet Union’s 40th Army “invaded” Afghanistan at the tail end of 1979, to help the fledging Communist Afghan government stay in power. Many of the distances that the Soviets found themselves fighting in, were extremely vast. Open deserts, mountain valleys, and other terrain that the full length AK74 was barely able to withstand itself in a fight. I posted this in my earlier AKSU piece, but this is a transcript from an interview I conducted with Marco Vorbriev, a former Spetsnaz veteran of the Afghan war-

Well its alot of fun. Lets talk about it from a far away point here. The gun is a tool in a toolbox to complete a certain job. And the job could be a regular contact fight, lets say 500-400 meters, to include maybe clearing houses or compounds. So from that regard you want something small, maybe be able to use it in close quarter combat, something really, easy to handle, easy to maintain. Well that is fine, considering if you are a police officer going through a house. It shoot 5.45 as well, so thats good for wounding. On the other hand, as a carbine, you need to be able to hit targets out to 300 meters. You can do that with an AKS74, no problem, even with an M4. But the AKSU? You might if you spray half a magazine in that particular direction. But I even have one, I shoot it for fun, I get a big old smile on my face. It’s fun to shoot, it’s just like rrrrrrrrrrp, almost like a little toy so to speak. Mikal Kalshanikov himself told me that he loved it, although he was a very anti 5.45 guy, but he was a big fan of the AKSU for some reason. But you put yourself in an actual gunfight, with people screaming everywhere, trying to get comm up, you taste the metal of adrenaline in your mouth, and now you are trying to pick out targets in the distance… it’s really hard with that gun. We were always trying to get rid of it for the AKS74.

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So who actually used it in the Afghan conflict? Also contrary to popular belief, the weapon didn’t make much of a presence with the Infantry specialities such as the RPG gunners, radio operators, the PKM gunners, or even the officers and NCOs. Looking through Soviet accounts, and especially photographs from that era, we see extremely little evidence to support that use. The terrain was just too massive to justify going to a secondary weapon system that could not hold its own in a gunfight, should the primary weapon system go down. However what we do is, is a wide issue of the AKSU among vehicle crews such as BMP and Mi8 (helicopters) personal that operated in the extremely confined spaces of their quarters. One of the more interesting developments of this issue was a plastic thigh holster that helicopter crews would house their AKSU in, with the magazine in a special pouch on their vest, just above the thigh holster. Unfortunately, none of these holsters have survived until today, or at least to the AKSU community in the United States.

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Another tidbit that we see the AKSU in use, is the addition of magazines taped together, or inserting a 45 round magazine originally designed for the RPK74. This shows the AKSU as an extreme Personal Defense Weapon, and as a PDW, the weapon really does shine. We see this usage among those vehicle and helicopter crews and it makes sense. If these Soviet soldiers had to ever use their AKSU, it would be because the Mujahadeen would have been overrunning their vehicles, or surrounding it to the point that they couldn’t use the vehicles weapon systems. Or in the case of a downed helicopter where the Mujahdeen would have been trying to get on top of the helicopter as fast as possible, to strip it of its weapons. In both of these instances, the soldiers would have needed as much firepower in as little time as possible, and thus would have benefited from two 30 or 45 round magazines taped together, or from a single 45 round magazine. A conventional soldier wouldn’t have benefitted from the additional weight on his rifle, especially in a firefight over several hundred meters. I can personally attest to this, due to my experiences in Afghanistan as an Infantry Marine. Double magazines seem to be a sound tactical idea, they exponentially decrease reloading speed. However, that is only tactically sound if you don’t have to lug the extra weight on the rifle around all day, while on patrol. Infantrymen will always be carrying their rifle around with them, while on patrol, walking around their base. If anything, frontline soldiers will be wanted to decrease weight from their rifle, instead of adding weight to it. But if the rifle sits in a vehicle all the time, then this added weight doesn’t really factor in at all, it isn’t being physically carried several kilometers a day. I found this out by going out on foot patrols, and immediately decoupled my magazines to lighten my load on the actual weapon.

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The other use of the AKSU was by the KGB spy agency in the form of a suitcase gun, with the muzzle device taken off to make it fit. The rear sight was fitted with a proprietary handle that locked into the suitcase and then became the handle for the external portion of the case. To bring the gun into action, a KGB agent would simply press a button on the handle, which would eject the suitcase away from the gun, and the AKSU would be ready for action. This model was called the AKS74U VIP, and is apparently still in service with close protection elements of the Russian police.

With the close of the Soviet involvement in Afghanistan in 1989, and the fall of the Soviet Union in 1993, full production of the AKSU ceased in 1992 at the Tula arms factory. However, production continued into 1993, and even into the 2000s for the European civilian market. A number of semi automatic only versions were made, in addition to a large number of deactivated AKSUs, the sale of which are very popular in the United Kingdom.

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But this wasn’t the end of operational use of the AKSU. The carbine continued to serve on, and we have a number of examples of this in Russian involvement in Chechnya. Outside of the military, as older models were phased out, a number of AKSUs found their way into the Russian Law Enforcement sector, where we continue to see them in service today. Tactical Life as an excellent description of how it is used in that capacity-

When I was in Russia almost 15 years ago, I had contact with some Russian special police units. One thing I quickly noticed was that you could tell how hardcore the police units were by whether they had 5.45x39mm AKS-74Us. The standard militia (police) weapon at that time was the Makarov PM. Those assigned to traffic duty, static posts and other relatively low-threat assignments carried a Makarov in the standard holster with one spare magazine on their belt. Often, I did not see anything else on the belt—no handcuff case or anything else for that matter. The patrol officers with whom I had contact worked high-crime areas or anti-organized-crime patrols. They also had Makarovs but were augmented by AKS-74Us, much as U.S. patrol officers carry a shotgun or carbine to deal with armed felons.

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Some of the notable personalities that have had the AKSU attached to them are Osama bin Laden and the congressman Charlie Wilson. Bin Laden always had his AKSU with him as a status symbol, because in modern day Peshawar and Afghanistan the weapon is seen as elevated status. Even during the Communist regime, the Soviets would occasionally gift the submachine gun to leaders and high ranking Afghan Communist Party members. Charlie Wilson was gifted it during his visits to Peshawar to help fund the Mujadeen in their fight against the Soviets. In fact the example he brought back to the United States with special ATF permission, is perhaps the only fully original and functioning as an automatic AKSU in civilian hands, not a rebuilt parts kits.

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These days, a number of gunowners are interested in rebuilding the AKS74U from various parts kits that have been imported into the United States from Russia. The overwhelming majority of these kits are Tula manufactured submachine guns that have been cut in various places to deactivate them. Usually what is needed to put them back together are receivers, barrels, and an American trigger group to make them 9.22 compliant. We’ll be focusing on this entire process in the next installment of the AKSU article series.

My NFA registered AKS74U from a Tula parts kit.

My NFA registered AKS74U from a Tula parts kit.


Miles V

Former Infantry Marine, and currently studying at Indiana University. I’ve written for Small Arms Review and Small Arms Defense Journal, and have had a teenie tiny photo that appeared in GQ. Specifically, I’m very interested in small arms history, development, and Military/LE usage within the Middle East, and Central Asia.

If you want to reach out, let me know about an error I’ve made, something I can add to the post, or just talk guns and how much Grunts love naps, hit me up at miles@tfb.tv


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  • tts

    This is a great article, bucha stuff I didn’t know about this gun which before always seemed kind’ve meh to me.

  • G0rdon_Fr33man

    I just want to point out that a NSN is not limited to the US Armed Forces. It means NATO stock number.

    • Kivaari

      45 years ago we had FSN, for federal stock number. NSN makes sense.

    • Learn something new everyday!

  • hikerguy

    Enjoyed the article and learned some new things. Thanks, Miles.

  • William Johnson

    Note that the grenade launcher pictured above is also “silenced”; it uses a separate round to fire the grenade. A Ukrainian officer attached to my team in Iraq carried the AKSU in 05. It was a fun to shoot and light to carry but not my preference for normal use.

    • iksnilol

      A silenced grenade launcher is a great idea IMO. No need to put silenced in quotes.

      Grenades are subsonic. Kinda hard to guess where you’re getting shot at from.

  • Wetcoaster

    1) I love the Lee-Enfield in the photo of the helo crews
    2) Any opinion on Kalashnikov shorties in other calibres like the Type 56C or some of the Yugo guns?

  • PXN

    I want the briefcase AK!!

  • Lance

    Very good article. And it tells of the limitations of SBRs for combat in open terrain.

    • Israel asskissing conservative

      SBRs is an American governmentism. They’re just carbines, since they’re shortened versions of the full size 16.3″ rifles.

  • Xeno Da Morph

    That was interesting!

  • Jose

    Don’t forget that the AKSU is still in production; Arsenal of Bulgaria is currently making those weapons, in all three calibers, as well Zastava, of Serbia, where they are manufactured as the M85 and M92. They should be included in the next article.

  • Darren Hruska

    I’d say that Tkachev is one of the unsung innovators of modern Russian firearms and PDWs. The AO-46 was pretty much the Soviet Union’s “counterpart” to Colt’s IMP and SCAMP (even though the PDW concept wasn’t quite “realized” until later). Also, he developed the systems that’d later be seen in (or have influence on) firearms such as the AEK-971/A-545, AK-107, AN-94, and TKB-0146.

  • Mike

    I want a Krinkov pistol.
    I have looked at AK pistols, but they are all in 7.62×39

    • Steve Truffer

      Because that would validate the 7n6 ban. No one made/makes them because of how cheap 7n6 was.

    • Devil_Doc

      Honestly, why wouldn’t you want an AK pistol/SBR in x39? 300BO/Whisper mimics the ballistics of x39 for a reason. Given a choice between subsonic for suppressed and supersonic for terminal performance, the x39 would beat the 5.45 in all respects, especially out of a short barrel. Ammo is more readily available too.

      • typical conservative fudtard

        7.62×39 out of that short of a barrel will fail to penetrate soft pistol armor at about 40 meters of range.

        5.45×39 out of that short of a barrel will fail to penetrate soft pistol armor at about 150 meters of range.

        5.45×39 is basically the same as 5.56×45, except for the fact that it’s inferior.

        • Devil_Doc

          Do you have any studies to back that up? Interested to see empirical data…

  • Kivaari

    Another excellent article with more information about guns I had never seen before. Simply excellent.

  • UVB76

    So the Russians figured out a suppressor(s) system(s) for these (and various variants)… Are the AKSUs not running into issues in TP concentricity as we constantly are warned about with our variants (or those being built out)? I would love for a suppressor company to take on a project for these platforms… Let us see some options in the M26x1. 5 LH and M14x1 LH field…

    • Devil_Doc

      Someone has made suppressors for the AK74.. Wanna say it was Silencerco? I believe there was an article here on TFB about it a few weeks back.

    • Israel asskissing conservative

      Thread-to-bore allignment problems are a myth for the most part.

      You can easily check allignment with a wooden stick, or a laser bore sighter.

      The market for that is too small.

      The 5.45mm is only 0.1mm smaller than the 5.56×45 NATO, meaning the same suppressors are viable.

  • Tritro29

    It’s missing the Dragunov Carbine.

    • Pictures and links, I might include it next time!

  • Goddamn I love this series. Makes me want to build/buy/drool

  • James Young

    Does the 5.54 round suffer significantly from the loss of velocity in the shorter barrels of the 74U like the 5.56 does in barrels under 10.5″? All those AKs seem to have very short barrels

    • All the Raindrops

      Yes, though 7n6 didn’t rely on fragmentation as much as the NATO ammo of the day.

      7″ is a bit short IMO. You would get a doubling in range with about 4 more inches.

      • Israel asskissing conservative

        It was incapable of fragmentation for all intents and purposes.

        Most models had barrels around 8.1″, in accordance to the solicitation that stated required barrel length and overall lengths.

        Adding 4 more inches is a joke, since 4 inches is the same length a suppressor would add to the gun.

        Adding 4 inches to the barrel would also make the gun pointless, since you could get a barrel of 12 inches(or much less) by just moving the gas block/front sight back on the gun(would require a different top tube and piston, but that’s it).
        If you want a 12 inch barrel, AKSU is pointless next to an AMD-65 type gun.

        With the 8 inch barrel the range is easily over 400 meters.

        Soviet doctrine and modern American doctrine demands that hits on target = effective range.

        400 meters is plenty of range.

        Extending the barrel to 12 inches would add about 300f/s.

        300f/s is the amount of velocity lost in the first 50 meters of the bullet’s travel….. so in other words, you’re not even extending the range by 20%. “Doubling” the range by extending the barrel by 4 inches with a barrel this long is RIDICULOUS.

        Maybe the range would be doubled by adding 4 inches to a barrel 5 or 6 inches long, but not here.

        8 inches is plenty long.

    • Israel asskissing conservative

      No.

      Neither does the 5.56.

      The only reason we stopped going shorter at 10.3 inches is because 10.3 inches is the shortest you can chop an AR-15 before you need to do more than just open up the gas port(_you need to start doing things like reprofiling the barrel to set the gas block back/grinding down the bayonet lug, etc._).

      There are plenty of demonstrations showing 5.56 is still nasty as hell out of a barrel the length of your finger. The same exists for 5.45.

      The barrels on these guns are short because that’s the whole point of them existing.

  • Ken

    Wilson’s AKS-74U was cut up and sold as a parts kit on Gunbroker a few years ago. He had donated it to the Texas A&M museum with the barrel plugged with epoxy.

    • All the Raindrops

      What a damned shame.

  • Israel asskissing conservative

    George Sullivan didn’t lead the design team of Eugene Stoner. It seems George Sullivan was basically in charge of drafting when scaling down the AR-10 to the 5.56×45(a cartridge which is basically a scaled down 30-06 in proportion).