Swedish riddle: experimental Automatkarbin 5 bullpup design


The only known photo of an experimental carbine


From the eighties the main infantry weapons The Swedish army is an automatic rifle / assault rifle Automatkarbin 5 or Ak 5. There are several modifications of this weapon with certain changes that affect the characteristics. At the same time, the general architecture of automata of all versions is no different. However, according to some reports, in the past there was an attempt to rebuild Ak 5 according to the bullpup scheme.

Misterious story


Unfortunately, almost nothing is known about one of the most interesting Swedish developments of recent years. Available data do not reveal the whole picture, and some of their features even allow you to suspect a joke or hoax. Nevertheless, in this case, the original Ak 5-based sample is of interest.

The existence of an unusual modification of the machine became known in 2013. Someone, under the nickname meo_swe, posted photos of museum weapons on the Klocksnack.se online forum. Among the well-known and familiar samples, an unusual carbine was present on them, resembling a modification of the serial Ak 5.

The author of the photograph indicated that this product was created at the beginning of the 5s. At that time, the Ak XNUMX modernization program was being implemented, and the Swedish gunsmiths intended to study the prospects of the bullpup layout. For this purpose, a prototype with a photo was made. No other information was provided. Moreover, since then no new details have appeared.

It is known that only existing modifications of the Ak5 traditional layout remain in service with Sweden. This suggests that an experienced bullpup machine did not show any advantages and therefore did not leave the test stage. The reasons for this are generally clear.

However, another version has the right to life. All история with an unusual carbine can be a hoax of one or another origin. Someone made a custom-made product from Ak 5 or its layout and “shared” it with the public. However, it is not known who exactly, when and why did this.

Design improvements


The only known photo of the mysterious carbine shows well the main features of the completed alteration. Its authors managed to save the bulk of the details of weapons; only individual units are newly made. Due to this, the total length of the weapon was reduced by a whole butt - approx. 260 mm.


Serial Ak 5 in the basic "long" version

The stock with the hinge, the pistol grip, as well as the trigger and its protective bracket, were removed from the serial carbine. Under the forearm placed the original frame with a pistol grip, a bracket and a trigger. Under the receiver, in place of the trigger guard, a new straightened casing appeared, accommodating the trigger.

In connection with the change in ergonomics, a new recoil pad appeared on the rear edge of the receiver. A soft cheek was placed on the left of the box. Behind the forearm on the box mounted bracket with a standard bar for the sight.

In an original way, the problem of the separation of parts of the trigger mechanism was solved. The main parts of the trigger have remained in place. The flag of the translator of fire did not begin to bear. The trigger extended forward was connected to the trigger using a flexible bowden cable. To avoid damage by moving parts, it was placed outside the receiver.

Removing the butt allowed to reduce the length of the carbine to 750 mm with a barrel length of 450 mm. The vertical and transverse dimensions remained the same. The mass of the structure, apparently, changed slightly. The weapon became easier due to the lack of stock, but it was immediately loaded with new parts.

Such alteration did not affect the design and principles of automation, did not affect the ammunition system, etc. Due to this, it was possible to quickly and simply complete a full-fledged technology demonstrator, suitable for the first evaluation of the bullpup scheme.

Obvious results


If the experimental carbine of the bullpup scheme was not someone's joke or hoax, the results of experiments with it are obvious. The Swedish army continues to use Ak 5 assault rifles of the traditional layout - it follows that the prototype did not show any advantages over existing weapons. Moreover, he could demonstrate serious flaws.

As a result, the experimental carbine (or carbines) was sent for storage, and the work on weapons of the bullpup scheme was stopped. A few years after these events, the prototype fell into the camera lens, and then gained fame in narrow circles.

Reasons for failure


Unfortunately, the authors of the project and the Swedish army are in no hurry to disclose data on an interesting project. However, even the available information allows us to imagine why the rebuilt carbine did not interest the army. He had not only advantages, but also disadvantages. Correction of the latter could overly complicate the project and deprive it of some of the advantages.


The carbine Ak 5D - a serial weapon of the Swedish army

The main advantage of the bullpup layout is its smaller dimensions with the same barrel length. It is also possible to win the accuracy and accuracy of the battle. Probably, an experienced carbine showed such qualities and could even bypass the basic model in some parameters. An important advantage was the maximum use of finished parts borrowed from Ak 5. In the long run, this made it possible to make new weapons by quickly and easily remaking cash.

At the same time, the bullpup layout leads to specific ergonomics. The center of gravity is not optimal, the moving parts and processes of the shot occur at a minimum distance from the shooter's head and hands, the replacement of the magazine becomes complicated, etc.

The bullpap version of Ak 5 also had several flaws of its own. So, the fire translator was left in the old place, which made it difficult to access. The connection of the trigger with the trigger using an openly located bowden reduced the reliability of the structure and could lead to fatal consequences.

It should be noted that all “their own” or “common” shortcomings of the experienced carbine could be corrected. However, this required a serious alteration of the entire structure, implying the replacement of a number of parts. In this case, the degree of unification with the serial model was sharply reduced - and one of the main advantages of the project was lost.

Swedish riddle


Apparently, the aim of the pilot project based on Automatkarbin 5 was to create a new small arms of reduced dimensions, as much as possible unified with the existing model. This experience was unsuccessful, and the modified machine did not enter service. The role of the “short” automatic weapon was retained by the Ak 5D serial carbine of the traditional layout.

Quite a lot is known about weapons of the Ak 5 family, but the experimental bullpup layout carbine remains an exception. It is hoped that the Swedish army in the future will decide to disclose data on this sample and confirm or refute existing versions. Unless, of course, it was a real development, and not a modern fake of unknown origin.
Author:
Photos used:
Klocksnack.se, Armémuseum / digitaltmuseum.se
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  1. Charik April 20 2020 18: 06 New
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    And in the photo there it passes to another - what is it - a flamethrower?
    1. Catfish April 20 2020 20: 40 New
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      Precisely, the launcher of the flamethrower.
  2. The leader of the Redskins April 20 2020 18: 14 New
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    Once he held in his hands a weapon of the bullpup system. As a man brought up on the "classics", it seemed uncomfortable.
    1. voyaka uh April 20 2020 20: 57 New
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      Matter of habit.
      1. Charik April 20 2020 22: 55 New
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        - and needs
      2. Alexey Lobanov April 21 2020 02: 13 New
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        Quote: voyaka uh
        Matter of habit.

        Oh my God! What have they done since 21 !? The bar on the bar to put the front sight and rear sight of the m4? :)))))))))) And the flamegas from 36? :) Photos from ukrvoenprom? And the collimator is not kosher.
        1. voyaka uh April 21 2020 10: 03 New
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          No need to worry so much. smile
          All on the same Picatinny rail, which is inseparable from the trunk
          (one factory part) and ensures their maximum parallelism,
          the largest of all competitors. Tavor's accuracy is perfect.
          And a set of quick-change optical sights is very convenient.
          After Tavor was introduced, the cost of ammunition per battle defeat fell
          several times.
          1. Alexey Lobanov April 22 2020 01: 03 New
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            Quote: voyaka uh
            All on the same Picatinny rail, which is inseparable from the trunk
            (one factory part)

            Well, the bar on tavern 21 is clearly not "one factory part"! Yes, it is attached to the barrel, but consists of at least two parts, one of which is attached to the barrel with pins and the other to the first with bolts and nuts. :) It would be interesting to hear more about the perfect accuracy of the brand !!! And about the consumption of cartridges! Where does the information come from? But, in general, you did not even understand sarcasm about the tactility of the brand in the photo! ;) Probably, every day you see Tavors in such a kit !? :)
            1. Alexey Lobanov April 22 2020 01: 15 New
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              Found! This is an American collective farm tuning! :)
            2. voyaka uh April 22 2020 10: 01 New
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              About accuracy - from operations. From infantry soldiers:
              "No need to give queues, shoot a lot.
              I took aim at a single person through the optics in the head - I hit him. "
              Like snipers before. The barrel is a usual rifle length.
              1. ProkletyiPirat April 22 2020 16: 35 New
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                "About the accuracy of bullpups"
                1) the bulpap has a longer barrel, therefore, ceteris paribus, accuracy, range, lethal force will be better
                2) at the bulpap, the points of fixation of the barrel (holding the weapon) are more advanced forward which increases stability which increases accuracy. Here are just a few: if the arms are held incorrectly, the back part begins to hang out and the accuracy goes into deep G. That is, we need the running time of the reflex of the hand and elbow to press the weapon “on itself”.
                1. Alexey Lobanov April 24 2020 23: 51 New
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                  Quote: ProkletyiPirat
                  1) the bulpap has a longer barrel, therefore, ceteris paribus, accuracy, range, lethal force will be better

                  Why did you decide that the bull dad’s trunk is longer? The trunk is the same, just the total length is shorter.
                  Quote: ProkletyiPirat
                  2) at the bulpap, the points of fixation of the barrel (holding the weapon) are more advanced forward which increases stability which increases accuracy.

                  Everything is exactly the opposite, in bull-dad the point of fixation of the barrel is shifted back. But sustainability boosts. :)
                  1. ProkletyiPirat April 25 2020 01: 52 New
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                    Quote: Alexey Lobanov
                    Quote: ProkletyiPirat
                    1) the bulpap has a longer trunk, therefore all else being equalbetter accuracy, range, lethal force

                    Why did you decide that the bull dad’s trunk is longer? The trunk is the same, just the total length is shorter.

                    Highlighted in bold "all other things being equal" among which the parameter "weapon length".
                    Quote: Alexey Lobanov

                    Quote: ProkletyiPirat
                    2) at the bulpap, the points of fixation of the barrel (holding the weapon) are more advanced forward which increases stability which increases accuracy.

                    Everything is exactly the opposite, in bull-dad the point of fixation of the barrel is shifted back. But sustainability boosts. :)

                    I would send you to a textbook on physics or banal logic, but I do not want to breed a shit. Therefore, lay out the scheme of fixation points for the classic and the bulpap, then immediately the reason for your error will become visible.
  3. bar
    bar April 20 2020 20: 23 New
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    Judging by the "only known photo", the center of gravity of this bull dad is behind the handle. How to shoot something from him if you don’t support with your shoulder? recourse
    1. ProkletyiPirat April 21 2020 01: 06 New
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      after all, you simply build up the pressure-on-hold reflex, as in fact for other bulpups, that is, if you rest the classic on the shoulder and support it from below, then the bulpap needs to be pressed into the shoulder. (the brush and elbow work differently)
      1. Alexey Lobanov April 21 2020 02: 19 New
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        Quote: ProkletyiPirat
        after all, you simply build up the pressure-on-hold reflex, as in fact for other bulpups, that is, if you rest the classic on the shoulder and support it from below, then the bulpap needs to be pressed into the shoulder. (the brush and elbow work differently)

        It is not necessary to press, the pistol grip is the main grip, and the shoulder is the fulcrum. It is important to learn how to control the right brush.
        1. ProkletyiPirat April 21 2020 18: 38 New
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          It is not necessary to press only on some models where the center of mass is closer to the handle ...
          For example, where there is a longer and heavier barrel, underbarrel grenade launcher, massive PBBS and optics, or where the magazine is inserted not closer to the back of the box, but right behind the handle ...
          Just compare the pictures of shak-12 above and the tornado below under this article, in the second option, you just need to press it, otherwise the accuracy drops sharply and significantly. And for this you need to develop reflexes of the hand and elbow.
  4. MORDVIN13rus April 20 2020 20: 33 New
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    From kakshoidov, more or less decent bullpup turned out only in South Africa.
    1. sen
      sen April 21 2020 05: 07 New
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      Our "Tornado"

      1. MORDVIN13rus April 21 2020 18: 20 New
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        Well, a piece of wood is better than luminium laughing
      2. fider 8 July 2020 09: 40 New
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        Our "Tornado"
        Masterpiece laughing
  5. Alexey Lobanov April 20 2020 20: 35 New
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    Firstly, I want to remind the author that the Swedish AK5 is an exact licensed copy of the Belgian rifle FN FNC. And, therefore, the lower receiver is also made of aluminum. To do in bull dad
    a hefty part of aluminum is nonsense. The bull-dad photo shows that the lower receiver is standard and additional elements are welded to it in a clearly artisanal way. Well, and the cable from the trigger is a song! :)
    Even for Swedes, this design is clearly a scumbag.
    1. Catfish April 20 2020 20: 44 New
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      Well, and the cable from the trigger is a song! :)

      Sure? Somehow it really turns out to be too artisanal. Or is it such a Swedish joke from the first of April? request
  6. Free wind April 20 2020 20: 36 New
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    Yes figs with him with this machine. Well, what is there for a blowtorch that they transmit to each other.
    1. Catfish April 20 2020 20: 41 New
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      Yes, it's a flamethrower, just. Launcher without a cylinder.
      1. Free wind April 20 2020 20: 45 New
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        No, it’s like him, to warm up the surfing, so that the enemies would jump on.
        1. Catfish April 20 2020 20: 46 New
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          And what just do not come up with! laughing
    2. MORDVIN13rus April 20 2020 20: 46 New
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      Most likely the Swedish version of the flamethrower M2A1.
  7. Alexey Lobanov April 20 2020 20: 59 New
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    And secondly, the window for ejecting sleeves is closed by a plug, there is no shutter cocking handle, instead of it there is some kind of black blaque, so they are both moved to the left and all exhaust gases will fly a right-handed arrow with a photo in face (photo is too small, to tell you exactly difficult, maybe I'm wrong). :) Well, and the bracket is contingent, welded to the upper receiver, which means steel. In general, the entire structure is similar to a humorous variation with a decommissioned “gun” by the forces of regimental weapons.
  8. Alexey Lobanov April 20 2020 23: 01 New
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    Quote: Sea Cat
    Well, and the cable from the trigger is a song! :)

    Sure? Somehow it really turns out to be too artisanal. Or is it such a Swedish joke from the first of April? request

    The lower receiver is aluminum and its width is equal to the width of the magazine receiver, it will not work in the FNC circuit to extend the pull from the trigger for the magazine. In addition to the cable from the speedometer or brake cable in any way :))))))
  9. Alexey Lobanov April 21 2020 01: 24 New
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    Quote: Alexey Lobanov
    And secondly, the window for ejecting cartridges is closed with a plug, there is no shutter cocking handle, instead of it there is some kind of black blamb, so they are both moved to the left

    Guilty, my cant, no transfer to the left, I just dealt only with FN FNC. The Swedes really have a nearly round shutter cocking handle, and black. In general, they are removable and interchangeable with FNC. And the shutter is in place. In the photo the fore-end is an old model, on modern AK5 the fore-end is almost round in section and up to the length of the arrester, with any barrel length. Flame arrester on new slotted type g36.
    So, we are dealing with an old project, we took an old rifle for implementation.
  10. Alexey Lobanov April 21 2020 01: 30 New
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    Quote: ProkletyiPirat
    after all, you simply build up the pressure-on-hold reflex, as in fact for other bulpups, that is, if you rest the classic on the shoulder and support it from below, then the bulpap needs to be pressed into the shoulder. (the brush and elbow work differently)

    All modern bull-dads are equipped with a lower rail on the forend to put the handle of the "transfer of fire." It is not necessary to press with it.
  11. Alexey Lobanov April 21 2020 01: 42 New
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    Quote: Sea Cat
    Well, and the cable from the trigger is a song! :)

    Sure? Somehow it really turns out to be too artisanal. Or is it such a Swedish joke from the first of April? request

    AND!!! I found the circuit and photo of the fuse for this bull dad!
  12. Kushka 28 May 2020 14: 41 New
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    Quote: Alexey Lobanov
    Firstly, I want to remind the author that the Swedish AK5 is an exact licensed copy.

    Based on what is known about the Mayans, Pharaohs, UFOs and aliens,
    I think it can be argued that the Earth as a whole is a copy, well, in general
    everything that we piled on her.