Military Review

Free shutter with trunk connection

54



Having spent a lot of time looking for opportunities to expand the scope of a free gate, I am pleased to present to dear readers the stamped design of a self-loading pistol with a new principle of operation of automatics - a free gate with connection of the barrel.

Self-loading pistols produced by world-famous companies are archaic, non-technological, unreliable and very expensive. And how could it be otherwise, if the representatives of these companies openly declare that they use a steel weight in 2-3 kg for the manufacture, for example, of a bolt. In this case, the manufacturer does not explain, and the consumer does not ask how much it costs and what is being done. For some reason, both of them are sure that it is good to take and “cut out” from a three-kilogram piece of steel, a three-gram shutter. In fact, such statements are based on the widespread, but erroneous opinion of people that a piece milled from a single piece of metal is stronger than a stamped one. Meanwhile, the current achievements in the field of metal stamping and welding make it possible to manufacture it without loss of quality from sheet steel. Such a stamped valve will serve no less, but cost in 5-6, and even in 10 times cheaper.

Technological scheme of the assembly of stamped-bolt


In most of the known designs of self-loading pistols, using cartridges with muzzle energy of more than 300 J, the weight of the moving system increases due to attachment to the barrel bore. So without increasing the weight of the bolt, and hence the gun, it is possible to keep the rollback speed within acceptable limits - 4-6 m / s. If the speed is greater, there is a risk of the gun breaking down, if it is less, there may be delays when shooting in difficult conditions - frost, dirt, shooting steeply up or down. This means that the faster the rollback, the more reliable and harder the automation works and, alas, the service life is shorter. weapons.

It should be noted here that not a single “coupled” pistol can be compared in reliability with a free-bolt weapon. The reason is the complexity of the design and the presence of large areas of fit and friction. To close the barrel, it is necessary to completely send the cartridge into the chamber. Even with minor contamination and under cartridge, the system is wedge. At the same time, the free shutter will provide a shot, even with strong pollution and underinvestment of the system to 2 mm, and only the shutter rim and the barrel end face each other in it.

Thus, it seems to me the most pressing task in the field of “pistol-building”, the essence of which is to create a simple, inexpensive and ergonomic sample, which combines the positive qualities of free and interlocking gates.

This task can be solved only by creating a self-loading pistol design with a new principle of operation of automation, which I called the free gate with the connection of the barrel. In fact, it is a system with an interlocked gate and a short barrel stroke, rotated at 180 degrees. As a result, the joint motion of the bolt and the barrel does not occur at the beginning of a rollback, but at the end - before striking the frame. The weapon is symmetrical, and all its details, except for the barrel and cheek, are shaped to allow them to be made from sheet steel and various profiles.

Gun detail: 1 - barrel; 2 - fly; 3 - shutter; 4 - pillar; 5 - ejector; 6 - cheek; 7 - return spring; 8 - frame; 9 - cheek latch; 10 - trigger guard; 11 - trigger; 12 - guide; 13 — combat spring; 14 — axis; 15 - trigger; 16 - Shop


The weapon is different from the closest analogue - my own gun model 2009 g ("Weapon", №10 / 2009), the following features:

- the barrel is made with two stops, between which is placed the front end of the trigger guard, which performs the functions of the barrel spring, parts for disassembly and the magazine latch;

- the return mechanism guide is made with a protrusion for a finger and a sear with grooves and with the possibility of displacement in the longitudinal and vertical planes;

- the ejector sleeve mechanism is made with elliptical holes, which he put on the bolt pin;

- the trigger is made with a rear protrusion for the finger and three safety, two of which are placed in the grooves of the sear, and the third - opposite the notch in the guide return mechanism;

- the trigger is made with an elliptical hole under the axis and with a protrusion, ensuring the interaction of the trigger with the store feeder and the execution of the shutter stop function;

- fighting spring acting on the trigger has bent up ends that rest against the barrel, which provides unloading of the trigger when turning it forward;

- the frame is provided with stops for the barrel and the bolt, limiting their rollback, a spring-loaded latch of the cheek is installed on the back wall of the well for the magazine, with the possibility of fixing the liner for changing the cross-section of the well.

With special sets of barrels and magazines, you can shoot the whole range of 9 and 7,62-mm cartridges with muzzle energy from 300 to 600 J and length up to 35 mm from a pistol. The sleeve mechanism cleans up cartridges and cartridges of different lengths and throws them forward-up.

A simple calculation shows that in order to preserve the integrity of the cartridges of these cartridges during a shot, a sufficiently free bolt of weight 330 g. In practice, it will be possible to get by with an easier shutter in 300.

Assume that the barrel and magazine modules are installed on the pistol for firing domestic 9xXNNMX mm or 21XNNMX mm ammunition, both of them disperse the bullet to J. 9. Let's fire a shot.

During a shot, the shutter, weighing 330 g works as free. This means that by the time the bullet leaves the barrel, the cartridge case will go to 2,1 mm, and the bolt will start rolling back at a speed of 9,3 m / s. Such a waste does not threaten to break the liner, but the rollback speed is too high. Continuing the rollback, the shutter will go over the cartridge fed to the discharging line and bump into the forward-loaded barrel that stands in its path. The weight of the barrel 140 g, and being attached to the gate, it will increase the weight of the moving system to 470 g and, accordingly, reduce its speed to 6,6 m / s. Taking into account the action of the return spring and friction, the waste of the liner will be less than 2 mm, and the speed will be less than 5 m / s.

After that, the barrel and bolt will make a short joint waste, compressing the spring of the barrel, in this case 2 mm. Having come to the rearmost position, they will hit their rim on the frame. Such a blow is quite comfortable for weapons and for the shooter.

We will install a barrel and a magazine for firing with a 7,62xXNNUMX mm TT chuck with a muzzle energy of 25 J.

During the shot, his sleeve will go to 1,5 mm, which also does not threaten its rupture. The shutter will first accelerate to 7 m / s, and after connecting the barrel it will brake to 4,9 m / s, and taking into account the return spring to 4 m / s. There can be no talk of any destruction of a weapon, and the shooter will perceive such a return as soft.

Now let's take a set chambered for 9x18 mm PM with a bullet energy in 300 J. The cartridge is short and you will have to install an insert in the well for the store.

In the foreground - a pistol incision with a patron chuck and the fuse turned on, the shutter and the trigger are blocked. At the back - the slide on the slide delay, the function of which is performed by the trigger raised by the feeder. Below - return and trigger mechanisms.


When fired, the sleeve will go to 1,7 mm, and the shutter will roll first with a speed of 5,8 m / s and then 4 m / s. actually 3 m / s. For reliable operation of automation, this speed is enough, and the return will be very comfortable.

Thus, the reliability of this system is due to the fact that the bolt first performs the main work on recharging: removes the sleeve, compresses the return spring, overcomes the friction forces, and only then gives up the remaining energy, if any, to the barrel and then to the main mass of the weapon .

Equipped with a patron chuck, the gun is completely safe. Nevertheless, the weapon is equipped with a manual fuse, which is activated by turning the trigger forward. At the same time, the bolt, trigger and trigger are blocked. He turns off by pressing the key in front of the hook, which then, under the action of the mainspring, returns to its original position. The trigger also performs the functions of an uncoupler and a safety lock when the cartridge is not sent, in both cases it goes down, releasing the sear. The ejector performs the function of the indicator of the patron chuck, speaking at the same time on the back side of the bolt. Thus, the shot is possible only when the safety is off, the cartridge is sent out and the trigger is fully pressed.

For incomplete disassembly, remove the magazine and pull the trigger, which protects the weapon from self-disassembly, from a combat platoon. Then you need, freeing and lowering the rear protrusion of the trigger guard, move it down until it stops. After that, just slide the bolt forward and separate it along with the barrel from the frame. Separate the barrel. It turns out only four parts.

As a result of incomplete disassembly of the gun, four large parts are obtained.


For complete disassembly, further push out the USM axis and separate its parts. Then, removing and disassembling the return mechanism, it is necessary to separate the trigger guard and the ejector. Disassemble the store. There will be a total of 17 details.

The presented design, despite its simplicity and cheapness, is powerful and reliable, symmetrical in design and function, intuitively simple to operate and safe. For the first time, thanks to the new principle of automation, it really provides for firing cartridges of different power and length, with only the barrel and magazine being replaced. Its design is consistent with modern concepts of high-class weapons.

Unfortunately, a more detailed description of the device and the operation of the gun will take a lot of space and therefore I have to recommend to readers and critics not to rush to conclusions, but to be more attentive to the attached drawings, where you can find answers to many questions.
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  1. mark1
    mark1 4 October 2013 08: 33 New
    +3
    This kind of automation is used in Stechkin pistols - OTs-23 "Drotik", OTs-33 "Pernach", as she is charged with a disadvantage - "insufficiently rigid barrel mount increases the dispersion of bullets." How true is it to judge those who exploited ...
    1. mark1
      mark1 4 October 2013 10: 48 New
      +2
      An interesting detail - a pistol with an interchangeable set of barrels (PM / PMM, Parabelum, TT / Mauser) was developed by Stechkin probably in the 90s (not to lie) - OTs-27 "Berdysh". Type of automation - a free shutter with a fixed barrel. Then they went OTs-23/33 (automatic shutter type with a movable barrel) It turns out that the Tarasenko pistol is a compilation of OTs-27 and OTs23 / 33. then the question arises - what is his outstanding contribution, what does he call his development of 2009? Enlighten me, quite possibly I don’t know everything.
      1. carbofo
        carbofo 4 October 2013 17: 13 New
        +1
        Many gunsmiths do this, pistol automation schemes have already been worked out and no one has come up with anything fundamentally new, and copying the automation scheme, for their own version of the gun in a different technological style, is already pulling for independent development.
    2. carbofo
      carbofo 4 October 2013 17: 09 New
      +1
      Quote: mark1
      "insufficiently rigid barrel mount increasing bullet spread"

      I believe that such technological weapons, I emphasize precisely technological ones, will be in demand only when there will be a need for mass weapons.
      As an example, a Sudaev submachine gun.
      In this case, its low accuracy characteristics will not greatly outweigh.
  2. SPLV
    SPLV 4 October 2013 09: 13 New
    +4
    Only for the fact of having ideas and developments there are two pluses! Theoretically - a worthy answer SIG 250. The practical side of the issue must be studied and worked out.
  3. Geisenberg
    Geisenberg 4 October 2013 09: 16 New
    +1
    Thanks to the author and success in work.

    PS ^ I wonder which pistol has a shutter made of three kilograms of blanks? Whatever deagle?
    1. mark1
      mark1 4 October 2013 09: 31 New
      +4
      Quote: Geisenberg
      ^ I wonder which pistol has a shutter made of three kilograms of blanks?

      This is a standard technique - a part close to the core is used from the ingot because the metal structure there is the most dense and uniform
    2. vanaheym
      vanaheym 4 October 2013 13: 28 New
      +4
      No one makes a 2-3 kilogram from a workpiece. First, forging the approximate dimensions of both the shutter and the frame is done, and then it is already milled in size
      1. mga04
        mga04 4 October 2013 13: 47 New
        +1
        Even so, the PM blank (not the largest) will weigh at least 1,5 kg.
        1. vanaheym
          vanaheym 4 October 2013 19: 38 New
          0
          When milling the forgings of an AR-15 lover, no more than 50% is lost (judging by the initial weight of the forgings and the final product). Why forging a PM pistol shutter with an average weight of 280g should weigh one and a half kilograms - tell?
  4. bunta
    bunta 4 October 2013 09: 28 New
    +2
    And how could it be otherwise if the representatives of these companies openly declare that for the manufacture of, for example, a shutter, they use a steel blank weighing 2-3 kg.


    Is it Filipinos or what? It’s really easier for them to mill than to apply precision casting.
  5. unclevad
    unclevad 4 October 2013 10: 29 New
    +1
    Interesting idea. Interchangeable barrels will expand the use of the gun. It remains to make it, determine its capabilities, test for reliability and resource. Good luck to the authors.
  6. Prapor-527
    Prapor-527 4 October 2013 11: 00 New
    +2
    Interesting, simple, intelligible! Article 'plus', the author of creative success! I would like to see this in metal.
    1. Locksmith
      Locksmith 5 October 2013 02: 18 New
      +1
      Quote: Prapor-527
      Interesting, simple, intelligible!

      True, the essence of the interlocked shutter is completely incorrectly explained = it does not just increase the mass of rolling parts, it just keeps the shutter tightly closed until the bullet flies out of the barrel = that’s the essence, and after that moment it’s not important which shutter system wink , for example, the "maximum" has a free shutter, but with a candibober, in fact, it turns out to be interlocked — the bullet departure time is comparable to the shutter reaction time, and for MP5, the shutter is free, but again there is a rollback delay — and the bullet manages to fly away before the shutter opens.
  7. mga04
    mga04 4 October 2013 11: 35 New
    +2
    I remember in the “Commentary of a specialist” on that very article in the journal (“Arms”, No. 10/2009) the question was asked - is there enough energy in the original trigger to break a capsule of a pistol cartridge? Did the author find the answer to this question? The experimental confirmation is of interest. If I remember everything correctly, only the trigger is left from the previous model. Generally interesting, but you need to check in the metal.
  8. ramsi
    ramsi 4 October 2013 11: 48 New
    0
    but I don’t understand, if the free shutter copes with a cartridge and automatic fire is not provided, then why bother with an engaged barrel? On the one hand there will be less weight and extra cartridges in the cage, on the other hand reliability
    1. mga04
      mga04 4 October 2013 12: 14 New
      +2
      The free shutter copes only with a fairly weak cartridge (9x18, 9x17, 7,65x17,22LR). You can, of course, use a free shutter and for more powerful cartridges, as is done in the PCB, only the mass of the shutter will be comparable to the mass of the entire gun. So PPSh (caliber 7,62x25) has a shutter mass of 595 grams, PPS-43 has 570 grams, plus a huge stroke compared to pistols.
      1. ramsi
        ramsi 4 October 2013 12: 41 New
        0
        in fact, the author writes here about 9x21 and a total weight of 470g ... Well, is it possible to make a composite shutter: the central part continues to lock the trunk with a turn, while the rolling main does not pick it up for reloading
        1. mark1
          mark1 4 October 2013 12: 45 New
          +1
          Quote: ramsi
          Well, is it possible to make a composite shutter: the central part continues to lock the barrel with a turn, while the rolling main does not pick it up for reloading

          And what does this give for the development of automation as a free shutter? The shutter is then interlocked.
          P.S. The total weight of 470g is the weight of the movable barrel and bolt, and the entire unit under a kilo-odd.
        2. mga04
          mga04 4 October 2013 12: 57 New
          +2
          In this case, the “pullback main” must be set in motion by something, it is either a gas engine (remember Desert Eagle?) Or a short barrel stroke. In fact, you are already describing automation with locking the trunk. The free bolt is not driven by recoil, but by moving back the sleeve: a bullet along the barrel forward - the sleeve with the bolt back. Due to the large difference in mass, the bullet leaves the barrel, and the sleeve-lock-spring system passes 1,5-2 mm. A bolt relief is possible with spring reinforcement - read the result in the comments below.
          1. ramsi
            ramsi 4 October 2013 15: 11 New
            0
            well, but if you split the reinforced spring into two: a stronger spring on the main gate, and a weaker spring in the inner well?
            1. mga04
              mga04 4 October 2013 15: 30 New
              +1
              If I understood correctly, you mean that the "main shutter" has a large mass, the "internal" is smaller. If we talk about a free shutter, that is, not coupled to the barrel, the "internal" shutter will be the first to leave and will move very quickly because it has a small mass. Next is the rupture of the sleeve ... The author of the article just proposes the separation of the mass of the shutter and the elasticity of the springs into two parts - the shutter + barrel itself and the return spring + barrel spring. But the bulk of it falls on the shutter, on the contrary, in your reasoning. Another question is whether the proposed shutter mass is enough? Here it must be considered.
              1. ramsi
                ramsi 4 October 2013 16: 05 New
                +1
                Actually, I thought that the internal bolt is also spring-loaded against the external one and this spring is only stressed when the pistol is assembled ... Well, here’s another option: at the beginning of the shutter stroke there is a short gear train (shutter-frame) - to slow down the rollback shutter in the first moments
                1. mark1
                  mark1 4 October 2013 16: 26 New
                  +5
                  For ramsi I must say you have an inquiring mind! The automation scheme proposed by you is called a semi-free shutter scheme - a very interesting topic since allows you to make really not heavy weapons, with relatively simple automation, under a fairly powerful cartridge (even under a rifle). There are many options for a semi-free shutter, but two schemes are mainly used - a pair of rollers and an accelerating part or a lever circuit, and as options for braking with powder gases discharged behind the shutter, all kinds of screw pairs, even friction of the shutter on the corrugated surface of the box, etc. etc. - In short, there is much to do.
                  1. ramsi
                    ramsi 4 October 2013 17: 50 New
                    0
                    Thanks, read. In my opinion, the Kerbra system would be quite suitable for a pistol, only the described braking liner can be spring loaded and positioned closer to the barrel (so that it works like a spring latch when rolling back, well, it could fold without interfering with the roll)
                2. mga04
                  mga04 4 October 2013 16: 46 New
                  +3
                  Quote: ramsi
                  Actually, I thought that the internal bolt is also spring-loaded on the external one, and this spring is only tensioned when the pistol is assembled

                  In this case, a pair of shutters will depart as a single part, possibly with a slight lag of the “main” - it depends on the elasticity of the small spring.
                  Quote: ramsi
                  Well, here’s another option: at the beginning of the shutter stroke there is a short gear (shutter-frame) - to slow down the shutter in the first moments

                  Read below mark1 - there is nothing to add. Unless examples: of the well-known are MP-5, G-3.
      2. mark1
        mark1 4 October 2013 12: 42 New
        +1
        Quote: mga04
        The free shutter can only cope with a fairly weak cartridge (9x18, 9x17, 7,65x17,22LR)

        That's right, but there were interesting deviations from the norm - for example, Draise pistols under 9mm Par. with a free shutter and a powerful return spring, cocked with a lever, like a crossbow.
  9. ko88
    ko88 4 October 2013 13: 18 New
    0
    all this okay, when pm will be sent to retire ?! what
    1. mark1
      mark1 4 October 2013 13: 20 New
      +2
      Quote: ko88
      all this okay, when pm will be sent to retire ?!

      What for? So tired of it?
  10. vanaheym
    vanaheym 4 October 2013 13: 29 New
    +5
    Something seems to me that the stamped-welded shutter will end after a couple of hundred shots.
    1. mark1
      mark1 4 October 2013 16: 29 New
      +3
      Quote: vanaheym
      Something seems to me that the stamped-welded shutter will end after a couple of hundred shots.

      Holy truth.
      1. Assistant
        Assistant 5 October 2013 18: 28 New
        0
        What about GS-18?

        The casing is made of die-welded, its billet is folded from a 3-mm steel sheet, welded along the joint and finalized by milling.
  11. dzvero
    dzvero 4 October 2013 14: 54 New
    +2
    three months later, the Chinese will put on export under the guise of their new original development ...
    1. vanaheym
      vanaheym 4 October 2013 15: 04 New
      +3
      The Chinese have enough of their designs for export.
      1. Chicot 1
        Chicot 1 4 October 2013 17: 08 New
        +4
        Quote: vanaheym
        The Chinese have enough of their designs for export.

        Sorry, Anton, but in my opinion the phrase "their developments"in relation to the" great "China, it is necessary to apply very carefully ... wink
  12. AlNikolaich
    AlNikolaich 4 October 2013 18: 27 New
    0
    I looked, read ... Something is in it ... A prototype must be made and tested. Prospects are visible!
    A little off topic: but on "Swift" what is heard? Together with Serdyukov to resign?
  13. uzer 13
    uzer 13 4 October 2013 20: 28 New
    +1
    The author quite correctly and professionally outlined the prospects for further improvement of the design of the pistol associated with the tendency to increase the power of ammunition. The designs of the pistols may differ, but the idea itself will be in demand. Moreover, no one forbids using other methods of braking the shutter.
  14. Urri
    Urri 4 October 2013 21: 51 New
    +1
    You cannot enter the same river 2 times. Stamping is Shpagin and Sudaev. This is a story. Prospects for mass weapons - three-dimensional printing. And Gauss on molecular capacitors, assembled at the kitchen level, already gives quite a decent rate of fire in a fully automatic machine and penetration. The project is great, but it's a weapon of past wars.
    1. Alex_T
      Alex_T 4 October 2013 22: 52 New
      +1
      Something about the three-dimensional printing of weapons is becoming increasingly popular. Modern 3D printers can print parts from plastic, food, gypsum and other things, but not one can print metal products, especially from durable steels and alloys. So far, the destiny of 3 printers in the production of weapons is plastic body parts, which are much simpler and cheaper to make from wood and glue, and the barrel, bolt, trigger must still be made of metal on the machine and a file. Of course, you can print all the details from plastic (except for the striker and springs), as in one film with the participation of J. Malkovich and K. Eastwood, but this will be a disposable product that is not safe for the shooter himself.
      1. Assistant
        Assistant 5 October 2013 18: 33 New
        +1
        And if you print from technical ceramics and bake? There is one problem so far: clay ceramics also sinter at temperatures above 1000 degrees Celsius, in the case of technical it is even more. But for sure, someone who has access to a 3D printer has access to a muffle furnace.
        1. Alex_T
          Alex_T 6 October 2013 12: 59 New
          0
          For the manufacture of ceramics, one muffle furnace is not enough. Cermet, for now, is of little use for replacing highly loaded critical parts in small arms due to increased fragility and tendency to crack (owners of ceramic knives know how to use it so as not to accidentally break the blade;)). If you really wanted to make a bagpipe, it’s easier from plumbing steel pipes, a file and straight hands. People far from mechanical engineering, design and material science can talk about printing working weapons on a 3D printer.
  15. understudy
    understudy 4 October 2013 22: 13 New
    +1
    A practical guide for a good locksmith? what
  16. Alex_T
    Alex_T 4 October 2013 22: 21 New
    +1
    Respect to the author for the works of the artist, 3D modeling and imagination, but I would not dare call this engineering work. Questions arise, the answers to which are not visible in the "design". For instance:
    1. What is the point of making the barrel dangling (less accuracy, strength, reliability, tendency to blockages), only to “soften” the recoil? There are simpler and more reliable solutions.
    2. What will push the spent sleeve further (up?) After the ejector is turned at the end of the shutter stroke? If nothing, then a wedge is possible when feeding the next cartridge from the magazine.
    3. USM working ??? Is self-cocking provided? It is very doubtful how the trigger 15 and trigger 11 will make multidirectional movements, being on the same axis and interacting only with each other.
    4. How to remove the trigger from the platoon if the trigger is completely hidden inside the frame?
    5. What is the installation sequence of parts 10 and 12 (trigger guard and guide)? Can they be assembled in frame 8?
    1. ramsi
      ramsi 5 October 2013 09: 23 New
      +1
      about self-cocking - it could very well be: when you press the trigger, the trigger will rest against the direct cross of the mainspring, and that, with its paws in the barrel, that is, the trigger must move back until it overcomes the spring force
      1. Alex_T
        Alex_T 5 October 2013 10: 36 New
        0
        Self-cocking is when the trigger moves counterclockwise, and the cock cockes clockwise (in opposite directions). At a certain point, the trigger breaks down and the movement under the action of the spring counterclockwise. The descent cannot act on the trigger for the movement of the platoon being on the same axis with it, without additional details (several parts).
        1. ramsi
          ramsi 5 October 2013 10: 57 New
          0
          maybe he initially stands in the position for the blow and descent through the spring only strains?
          1. Alex_T
            Alex_T 5 October 2013 11: 06 New
            0
            if the trigger cannot put the trigger in the position for the strike, then there is no self-cocking, and this is yesterday.
            1. ramsi
              ramsi 5 October 2013 11: 17 New
              0
              Do you want to say that either the descent is too hard, or there is not enough power to break the capsule? ..
              1. ramsi
                ramsi 5 October 2013 12: 47 New
                0
                it seems to me that it still works like this: at first - as I described, then the trigger pops up with its slot below the crossbar of the spring and remains cocked in the upright position (the spring is stressed).
  17. Urri
    Urri 4 October 2013 23: 01 New
    0
    Quote: Alex_T
    but it will be a disposable product that is not safe for the shooter himself.


    We look on YouTube the three-dimensional press of the AR-15 receiver. Modern trunks are already 50-60% plastic, in addition, ceramics can also be printed (including on the trunk). High-quality weapon plastic, not every file takes. Three-dimensional printing is a revolution in mechanical engineering cleaner than Johann Guttenberg.
    1. Locksmith
      Locksmith 5 October 2013 02: 22 New
      +1
      Quote: Urri
      Modern trunks are already 50-60% plastic

      Okay to invent something, wink if the liner inside is steel and outside coal is not plastic at all wink
    2. Alex_T
      Alex_T 5 October 2013 10: 08 New
      +1
      Urri, tried to use a tool made of low-quality steel? For example, to unscrew a tight screw with a screwdriver with a soft sting or hammer a nail with a children's plastic hammer? Is there a video on YouTube where they shoot from a printed weapon more than once? If the printed product looks like a combat product, it does not mean at all that it will work like a combat one, not to mention the resource. Strength, density, wear resistance, hardness, heat resistance, elasticity and other internal properties of the material have not been canceled in engineering so far. It is possible to print weapons made of plastic, but it should be designed taking into account the material being manufactured.
      1. Assistant
        Assistant 5 October 2013 18: 39 New
        0
        The thing is small: from the point of view of materials science to develop such a weapon so that the maximum number of loads, mechanical and thermal, falls on the minimum number of parts (ceramic), and the main parts have minimal loads.
  18. faraon
    faraon 6 October 2013 13: 17 New
    0
    I read the article and remembered the old joke.
    The Americans captured a Kalashnikov assault rifle (of the latest development) in battle, and were very discouraged since when disassembling the assault rifle they did not find micro chips and a computer.
    That's what I’m going to repeat about, because there are excellent developments, for example, the Israeli Ericho pistol. Made of carbon fiber, a metal bolt frame. If not completely disassembled, it consists of three parts. The bolt frame, barrel (which can be changed if necessary), and the handle itself (bed) is made of carbon fiber. The gun has proven itself on the good side, does not require care in a combat situation, Automatic.
    Just buy a license and start production. Moreover, in the Russian industry there are developments of composite materials (carbon fiber), as well as greater experience in the production of weapons for any purpose.
  19. ramsi
    ramsi 6 October 2013 16: 20 New
    +1
    here’s what else came up with this scheme (and its universalism) - it should be sensitive to barrel length
  20. LAO
    LAO 6 October 2013 19: 28 New
    0
    Very interesting - a beautiful idea! But the moving barrel is always a minus in the design of weapons. In modern designs, it is better to use a fixed barrel.