Military Review

Less Noise, Less Recoil: US Army Tests of the Smuzzle Hybrid Muzzle Brake Shown

76

In the research laboratory of the US Army Combat Development Center, they talk about the creation of a new generation of a combined device for an automatic rifle weapons... We are talking about a special device primarily for machine guns, which is a kind of hybrid of a muzzle brake and a silencer.


The device, called "Smuzzle", is mounted on automatic weapons and reduces recoil, flash and noise levels when firing.

Gregory Oberlin, a small arms engineer at the said American laboratory, says that the use of such hybrid devices will help to carry out more covert firing to suppress enemy personnel. It becomes extremely difficult to detect a machine gunner when the sound of shooting is practically inaudible, when the intensity of flashes during shots is reduced. And this alone can cause panic in the enemy, according to G. Oberlin.

Low noise technology for infantry weapons will allow small units to confuse the enemy, providing new opportunities, for example, for flank attacks.

The noise level when firing is reduced by up to 50 percent.

It is noted that the new hybrid muzzle brake helps to curb the so-called "muzzle rise", when the weapon, as a result of shots, begins to move upward from the horizontal axis of aimed shooting.

It is noteworthy that American engineers are planning to use a new hybrid brake for weapons of various calibers.

From a message from a laboratory representative:

We also develop large caliber muzzle devices. The principles are almost identical.

They tested a new combined muzzle brake on the M240 machine gun, which is currently in service with the US and Belgian armies.

On the video from the tests, you can pay attention to how the "muzzle" gets hot during continuous firing, when the machine gun is fed in a belt version. Shooting is stopped when an open flame is ejected from the muzzle brake.

A video of the tests is shown, according to which it can be judged whether the shooting noise is significantly reduced:

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  1. Operator
    Operator 26 July 2020 19: 02
    0
    This is not a muzzle brake-compensator, but a silencer, which was enough for 20 seconds of continuous firing or 200 shots, after which the silencer was out of order.

    And yes - in order to muffle the noise of a shot, you must shoot with subsonic bullets.

    In addition to muffling the noise of a shot and suppressing the muzzle flame, the muffler actually reduces the recoil impulse by about 1/3 - the component of the impulse from the emission of powder gases - however, when firing a burst, it also contaminates the receiver and the shooter's face with powder soot
    1. Aibolit
      Aibolit 26 July 2020 21: 21
      +8
      Quote: Operator
      which was enough for 20 seconds of continuous shooting or 200 shots

      belay

      wow this

      often shoot with a silencer CONTINUOUSLY for 1: 26 - 0,3 minutes 1: 20-1: 23
      Eh?
      Quote: Operator
      otorogo enough for 20 seconds

      beep, disrespectful, beep

      Quote: Operator
      And yes - in order to muffle the noise of a shot, you must shoot with subsonic bullets.

      A device for silent flameless firing, a device for silent and flameless firing (PBBS; sometimes a silent firing device or a flameless firing device, PBS; open muffler, abbreviated razg.glushak) - a muzzle mechanical device for small arms, weakening the sound of a shot and hiding the flame of powder gases, thereby preventing unmasking the shooter or drawing attention to him. Attaches to the barrel of a weapon or is an integrated part of the weapon's structure.

      One of the approaches to a comprehensive solution to the problem suggests that only a cartridge with a subsonic bullet velocity can radically reduce the sound of a shot, since when fired at a supersonic speed of a bullet, even with ideal muffling of the sound of a shot, the sound generated by the shock wave remains.

      If radically NOT needed then machine gun M240B subsonic speed in ... in (oo) is not needed.
      ====================
      The task was
      Their mission was to reduce recoil and muzzle flash, while REDUCING weapon recoil, which is affectionately referred to as a pig because of its sound and weight.


      This research, conducted between 2007 and 2018, led to the development of dozens of prototypes and four patented technologies, including US Patent 10, a 598-year mineral patent issued to the Army in March 458.

      compared to a standard muzzle suppressor / suppressor The hybrid device, which has asymmetric ventilation through tiny holes, also provides a 50% reduction in volume at the shooter's ears and a 25% reduction in flash range with minimal weight gain.

      Local chuchunDrik from a topvar, you ... you just do not know the topic and OPERATE with crap (hang noodles for the electorate)
      1. figwam
        figwam 26 July 2020 21: 48
        -1
        The machine gun fired for a minute, the tape remained, but the machine gun jammed.
      2. Revival
        Revival 26 July 2020 23: 45
        +2
        "at the same time REDUCING the recoil of a weapon that is affectionately called a pig because of its sound and weight."

        Maybe you still mean "hog" M60?
      3. Narak-zempo
        Narak-zempo 27 July 2020 01: 00
        +3
        Quote: Aibolit
        often shoot with a silencer CONTINUOUSLY for 1: 26 - 0,3 minutes 1: 20-1: 23
        Eh?

        The fire was opened at the 6th second, and at the 31st the muzzle device had already ceased to perform the function of extinguishing the shot flash. Considering that this device is being developed for advanced systems for a powerful 6,8 mm. cartridge, you should expect that with it he will start spitting fire after a fewer shots.
        Note to the hostess: Take a chop and wrap it around the muffler before opening fire. Only 500 rounds are enough to get it ready wassat
        1. And Makarov
          And Makarov 27 July 2020 07: 31
          13
          Quote: Narak-zempo
          Note to the hostess: Take a chop and wrap it around the muffler before opening fire. Only 500 rounds are enough to get it ready

          A man is at war, the hostess is cooking nearby :-)
        2. Alexander Drobyshev
          Alexander Drobyshev 27 July 2020 09: 07
          +1
          Good day. I overlooked something, and which cartridge of 6,8 mm is more powerful than 7,62x51 mm, for which the M240B machine gun in the video is going to be adopted in the USA? Can you explain?
          1. Narak-zempo
            Narak-zempo 27 July 2020 09: 09
            0
            Quote: Alexander Drobyshev
            machine gun M240B

            Yes, the error came out. Confused with M249.
            1. Alexander Drobyshev
              Alexander Drobyshev 27 July 2020 09: 16
              0
              They tested it on the M240B machine gun under 7,62x51 mm and also on the promising NGSW-R rifle in 6,8 mm caliber from Textron.
      4. Boris ⁣ Shaver
        Boris ⁣ Shaver 27 July 2020 02: 17
        +2
        Quote: Aibolit
        Mineral patent issued to the army in March 2020

        It's a mystery to me why you singled out this "patent" in connection with the topic under discussion?
  2. Vlad T
    Vlad T 26 July 2020 19: 02
    -1
    Ideally, all small arms should be silent ... The trends for this are unambiguous, even mortars have appeared ...
    1. Ramzaj99
      Ramzaj99 26 July 2020 21: 25
      +3
      Quote: Vlad T
      Ideally, all small arms should be silent.

      So Yes. But in this case it is rather a brake compensator and a flame extinguisher. Without subsonic cartridges, any muffler is like that.
      And there is also an important factor, all these "bells and whistles" weigh quite a lot. I somehow had to run around with a glushak on a Kalash, if you raise the aim and lower it, your hands will soon fall off to hell ... (I'm talking about what if you hang it on each barrel)
      1. Stalllker
        Stalllker 27 July 2020 04: 17
        -2
        The gym will help you so that your hands do not fall off. And why Kalash with glushak? There is a shaft for this
        1. Ramzaj99
          Ramzaj99 27 July 2020 16: 43
          -1
          Quote: Stalllker
          The gym will help you so that your hands do not fall off.

          What have you got in? Trainer of sofa troops)). Run for half an hour with a toy automaton in your hands, then tie a half liter bottle of water to its trunk and run for another half an hour, and feel the whole difference ...
          Quote: Stalllker
          And why Kalash with glushak? There is a shaft for this

          If you are blind with our "colleague") a conversation about what if all ALL barrels are equipped with PBS ........
          1. Stalllker
            Stalllker 28 July 2020 07: 40
            -1
            You are probably one of those Wars who are now running through the woods and shooting balls at each other ??? You have spectacular trunks, but absolutely goofy.
          2. Stalllker
            Stalllker 28 July 2020 07: 43
            -1
            I ask you once again, a forest elf, why make a garden with ak, if there is a shaft? Or are you not looking for easy ways for Dostoevsky's novel ?!
            1. Ramzaj99
              Ramzaj99 28 July 2020 17: 02
              0
              Quote: Stalllker
              I ask you once again, a forest elf, why make a garden with ak, if there is a shaft?

              You are even less crazy than I thought .......
              I can advise you to call you at the Ministry of Defense and ask them: - why did you adopt the PBS on AKM when you have a Val ?? !! ....
              I won't even bother to explain to you about subsonic cartridges, about range, cost, and the fact that these barrels cannot be compared at all, since they are created for different purposes.
              In short, the topic is closed .......
            2. Alexander Drobyshev
              Alexander Drobyshev 31 July 2020 14: 04
              0
              And where is the "Val"? Do the "specialists" who "work at the address" or the conscripts from the reconnaissance company of the motorized rifle battalion? Your "Val" has a maximum sighting range equal to a direct shot from an AKM with a cartridge with a PS bullet, so all sorts of "special forces" run around with weapons chambered for 9x39 mm, and in the army they continue to use the more universal 7,62x39 mm and a removable "can", now out instead of the old AKM and AKMS, they accept the new AK-15.
              Simply put, the "AKM + cartridge with a PS bullet + US cartridge + PBS-1" set gives more opportunities in combat at different distances than the "Shaft + 7N12 cartridge"
      2. Vlad T
        Vlad T 27 July 2020 13: 34
        0
        Here, perhaps, a different weapon system is needed, not traditional, with a different propellant charge and sighting. Perhaps based on reactive principles with a controlled lethal part ... This is a universal high-speed missile, 20-30 mm with a controlled flight of a warhead ... It's time to move from "crossbow to fittings", a kind of leap in the development of weapons came in time ...
        1. Ramzaj99
          Ramzaj99 27 July 2020 16: 36
          0
          Quote: Vlad T
          maybe you need a different weapon system, not traditional,

          Again I agree)) The future belongs to the silent weapon. Either with other systems like Val or with ultra-light materials, possibly some new heat-resistant composites.
          1. Vlad T
            Vlad T 27 July 2020 21: 18
            0
            Today, by a shot, devices determine the place of the shooter or other firearms, so soon there will be such devices in each compartment with the calculation of the shooter's place and will instantly be covered by the coordinates obtained ... Circumstances are already compelling ...
    2. Narak-zempo
      Narak-zempo 27 July 2020 01: 08
      0
      Quote: Vlad T
      Ideally, all small arms should be silent ... The trends for this are unambiguous, even mortars have appeared ...

      And it would be even cooler to do without a firearm and kill an adversary with the power of thought laughing
    3. Stalllker
      Stalllker 27 July 2020 04: 15
      0
      The mortar appeared for other reasons.
  3. Sergey Averchenkov
    Sergey Averchenkov 26 July 2020 19: 06
    +4
    At the expense of recoil I do not see, the device is clamped in the machine. Noisiness? Well, put a muffler on anything and the noise will naturally be less. Some kind of stupidity.
    1. Stalllker
      Stalllker 27 July 2020 04: 18
      0
      This is not stupidity, this is the American money pump !!
  4. Mountain shooter
    Mountain shooter 26 July 2020 19: 11
    +3
    Modern design and manufacturing methods (for example, 3-D printers made from metal powders) allow you to do many things that were previously difficult or impossible to do. PBSs have been known for 100 years soon, and there are no limits to perfection. I saw something similar on "Pecheneg" ...
    1. dvina71
      dvina71 26 July 2020 19: 17
      0
      Quote: Mountain Shooter
      e.g. 3-D printers made of metal powders)

      This is a complete analogue of casting. Only the casting molds do not need to be prepared.
      What can you do with a printer that you can't cast ... a riddle ..
      1. Mountain shooter
        Mountain shooter 26 July 2020 19: 20
        +1
        Quote: dvina71
        This is a complete analogue of casting. Only the casting molds do not need to be prepared.
        What can you do with a printer that you can't cast ... a riddle ..

        Not complete. Analog. Powders can be of different compositions. How to make a casting from cermets?
        1. dvina71
          dvina71 26 July 2020 19: 22
          +4
          Quote: Mountain Shooter
          How to make a casting from cermets?

          I'll tell you a secret .. ceramic-filled bushings for pivot pins of trucks have been known for a long time .. when they didn’t know anything about 3D printing ..
      2. Holgerton
        Holgerton 26 July 2020 21: 48
        -1
        Complete analogue, but not casting, but injection molding. And injection molding for metal is a rather laborious and high-tech process, which differs from the same injection molding for rubber and plastics.
        With powder metal 3D printing, you have the opportunity to produce a large number of parts of complex shapes that do not need micron to micron quality without using turning / milling for this, you also have the opportunity in some cases from welded / soldered / screwed joints of parts and reduce weight and dimensions, and the production of parts of even the most curvilinear section will require only a certain amount of support, which will stretch the production process by only 15-20%
        In the case of mufflers, you do not need a perfectly smooth surface, you can create chambers of the configurations you need, and use a minimum of welding during the final assembly, and the outer casing of the muffler is already made not by casting, but by rolling and has an incredible manufacturability. In addition, the 3D printer itself will take up much less space, create fewer dangerous precedents, have less production waste, consume less energy, be operated by a maximum of two people who know how to use CAD / CAM systems, as well as comparable performance " semi-finished products, which, all other things being equal, saves space.A workshop for such 3D printers, which will be used exclusively for the production of mufflers, will require only a small area of ​​metalwork and welding. While for casting, you will need an ebb and flow workshop, for post-processing and more time consuming assembly.
        1. Stalllker
          Stalllker 27 July 2020 04: 23
          -1
          Yes, what are these analogs ??? The technical processes are different. Take induction, blast furnace and electric furnaces, all three melt metal, but the process is different for everyone. And they are not analogues to each other
          1. Holgerton
            Holgerton 27 July 2020 07: 29
            -1
            Different technical processes do not cancel the same principle of creating a structure. In 3D printing, you weld layers of metal, essentially casting the desired structure in layers, and its characteristics will correspond to a greater extent to cast parts with improved tensile / torsion characteristics.
            And regarding different types of melting during casting, how does the melting process change the very essence of casting as a production process?
            1. Stalllker
              Stalllker 28 July 2020 07: 36
              0
              The essence of casting does not change, it changes the physical properties of steel
      3. voyaka uh
        voyaka uh 26 July 2020 23: 33
        +3
        Nothing to do with casting. Common to conventional powder metallurgy
        just the material.
        You probably didn't understand the principle of 3-D printing:
        layer-by-layer addition of material with sintering it. Designing from below
        up.
        For example: task: print a ball. 3 drops will be printed first (first layer)
        then - 14 (second layer), etc. (figures are approximate) Moreover, inside the ball you can
        make canals of any shape and complexity with loops and cavities.
        1. Narak-zempo
          Narak-zempo 27 July 2020 00: 40
          +1
          Quote: voyaka uh
          It has only material in common with conventional powder metallurgy.

          I would like to be wrong about 3D printing of metal products, but I somehow do not trust powder metallurgy at the household level. Immediately comes to mind the sight of a collapsed mixer and the words of the seller in the store: "Never take this one - powder, rubbish. Take that one, there is real brass, casting."
          1. Stalllker
            Stalllker 27 July 2020 04: 26
            +1
            Why not trust there ??? Sintering of metal particles occurs under the action of a laser. As a result, the detail in both cases
          2. voyaka uh
            voyaka uh 27 July 2020 10: 36
            +1
            3-D print rocket nozzles, many parts of aircraft jet engines.
            The more complex the part, the more bizarre it has with different internal channels, the more profitable 3-D printing becomes.
            There is no turning, no milling, no drilling. Zero waste with micron precision and uniformity of product density.
            Printing screws Z-D with a seal is unprofitable (although it is possible). smile
  5. A. Privalov
    A. Privalov 26 July 2020 20: 41
    +3
    There is, if you think about it, crazy power. Nobody canceled the laws of physics. Heat needs to be removed this way or that way. what
  6. Alexander Drobyshev
    Alexander Drobyshev 26 July 2020 21: 04
    +5
    Also damn it, a great event, put a "can" on the machine gun. From 1996 to 1999, we produced a small series of machine gun AEK-999 "Badger"
    something didn't take root
    1. Stalllker
      Stalllker 27 July 2020 04: 31
      0
      Because for a machine gun is absolutely unnecessary thing
      1. Alexander Drobyshev
        Alexander Drobyshev 27 July 2020 10: 08
        -1
        No, there is one application - when storming urban development
        1. Stalllker
          Stalllker 28 July 2020 07: 38
          0
          Tell the specialists how to run around the building with such an oar laughing
          1. Alexander Drobyshev
            Alexander Drobyshev 28 July 2020 08: 45
            -1
            You are the designers who have developed "Pecheneg-SP"
            or to those who developed the tactical silencer for the "Rotor-43" GDTK for "Pecheneg" tell

            (the length of the continuous burst is 70 shots, the critical one (after which the device is destroyed) 370 shots)
            how to run with such a paddle through the building
            you ask the Germans in Stalingrad, this is their idea that assault troikas from a machine gunner and two machine gunners should be used when cleaning a building, and this machine suits them
            1. Stalllker
              Stalllker 28 July 2020 09: 49
              0
              And that they were developed?)))) They did not take root. I wrote to you about specialists who directly work in urban conditions, especially in buildings
              1. Alexander Drobyshev
                Alexander Drobyshev 28 July 2020 16: 30
                0
                Well, they did not take root - they did not take root, although not everyone seems to have been informed about this, they drag it out of old memory


                I do not argue that a joint-arms battle is meaningless, and it will not survive there, but for special operations it has the right to exist
                1. Stalllker
                  Stalllker 29 July 2020 02: 26
                  0
                  In order for the muffler to work effectively, it is necessary that the volume of the muffler corresponds to the volume of the flash of powder gases at the exit of the barrel. I do not understand at all that these pipettes are on the barrels of the machine gun. And for special units there are other types of weapons for silent shooting. In your case, it's like sticking wheels from KamAZ for a Zhiguli, for better cross-country ability. From a technical point of view, you can get confused and implement, but why, if there are already finished products ?!
                2. Stalllker
                  Stalllker 29 July 2020 02: 41
                  0
                  Yes, and the campaign is a muzzle compensator
                  1. Alexander Drobyshev
                    Alexander Drobyshev 29 July 2020 07: 03
                    0
                    These are mostly low-noise firing devices that play the role of a closed tank destroyer, here is a link to an article with a test of the Rotor-43 GTD for Pechenega (http://maksimov.su/oruzie-i-boepripasi/tuning-oruziya-i- aksessuari-ipsc / tuning-oruziya / produkziya-rotor-43/311-gdtk-rotor-43-pkmpecheneg-gazorazgrujennyy-dtk-zakrytogo-tipa-dlya-pulemetov-pkm-i-pecheneg.html)
                3. Stalllker
                  Stalllker 29 July 2020 02: 42
                  0
                  And to use subsonic cartridges for a machine gun is a perversion
                  1. Alexander Drobyshev
                    Alexander Drobyshev 29 July 2020 06: 53
                    0
                    I do not argue, but when it is tightly fastened, then it is possible, in the photo the DP-27 machine gun with the SG-DP silencer, such were occasionally used in battles near Moscow in 1941-42
            2. Stalllker
              Stalllker 28 July 2020 09: 50
              0
              And the designers do not run with this paddle on floors
  7. Operator
    Operator 26 July 2020 22: 18
    -2
    Quote: Aibolit
    in (oops)

    Sorry, I didn't know your address in Israel earlier.
  8. Shurik_2
    Shurik_2 26 July 2020 22: 41
    0
    Most of you are discussing the wrong thing. The main speech was about an effective muzzle brake. It’s not so obvious that the barrel doesn’t bulge, but this is much more accurate shooting and a potential danger to our military. And they shoot like this continuously only during trials, in reality no one will shoot like this and, accordingly, the barrel will not be so warm. And in the future, they want to put this brake on all their weapons, and this is a big loss of life with more accurate shooting. So the muffler has nothing to do with it.
    1. Katanikotael
      Katanikotael 26 July 2020 23: 33
      +5
      So it is screwed on tightly, so it does not bully!
    2. Stalllker
      Stalllker 27 July 2020 04: 34
      +1
      Why then do the muzzle brake closed ??? Flame suppressor ?! Also not an option for a machine gun
  9. Narak-zempo
    Narak-zempo 27 July 2020 00: 25
    +2
    "Smuzzle" ("Muzzle")

    Smuzzle is probably "silent muzzle", "silent muzzle".
  10. beeper
    beeper 27 July 2020 01: 19
    +2
    Yes, indeed, an impressive result from this elegant device! good
    The "good old" 7,62mm M240 MAG rattled with it quite "in an undertone", almost like an industrial sewing machine of the 50s. yes
    And the "PBS" is heating up not very strong - that time (before "warming up to red hot" and the appearance of the unmasking muzzle flame) would be quite enough to make the attacking chain lie down. IMHO
    It is a pity that it is impossible to judge from this video how the barrel of a machine gun (no longer firmly fixed on a stationary stand) behaves in terms of reducing the "muzzle rise", when firing "from a bipod" or "from a machine" with this device ??! request
    PS But you could have tried to solve the same problem of reducing the sound and flame of automatic fire in a simpler and more efficient way ?!
    Creatively using well-known principles, and not "stupidly" going the "traditional" way (moreover, fraught with intensive contamination of the insides of a machine gun with products of (incomplete) combustion of gunpowder and primer composition, and finely dispersed metal shavings) ?! winked
    1. sg7s
      sg7s 27 July 2020 02: 16
      0
      Shoot? meaning? discover, pay off! The task is how many tracers should be put in three, five? What pbs? Meaning?? There is a sniper, ak with pbs, in the near - the same shafts, why fence?
  11. sg7s
    sg7s 27 July 2020 02: 11
    0
    IMHO - subsonic shooting and SUBMACHINE - things that are incompatible a priori based on their purpose ...
    1. Alexander Drobyshev
      Alexander Drobyshev 27 July 2020 14: 49
      -1
      Sometimes they are both compatible and necessary, as, for example, in the battles near Moscow in 1941
      DP-27 machine guns with SG-DP silencers were used
  12. Gloomy skeptic
    Gloomy skeptic 27 July 2020 03: 35
    +3
    Another superfood invention. Why do you need a device that only partially muffles the sound of a shot ??? Judging by the video, this is "jamming" about NOTHING at all. But the recoil of a machine gun PRESSED to the machine gun clearly "decreased" laughing
    The main thing for this "talented" "inventor" is to ask for another billionaire to "refine" this "masterpiece" !!!
    1. Fibrizio
      Fibrizio 27 July 2020 13: 42
      0
      Such a thing is needed so that you do not fly back at night due to flashes, do not light up the image intensifier, and it does not jam like in "Hollywood films", its meaning is that it becomes difficult to determine the direction beyond 300-500 meters.
  13. sen
    sen 27 July 2020 05: 53
    +1
    We have a similar device known as PMS - a low-noise firing device.
    For example, the Russian machine gun for special forces "Pecheneg-SP", created according to the program of military equipment for the soldier "Ratnik" and shown in 2014, is equipped with a PMS developed for it, which allows, before cooling is necessary, to fire 100 shots in short bursts of 3-5 shots and 50 shots with continuous fire.
  14. The comment was deleted.
  15. uav80
    uav80 27 July 2020 09: 28
    0
    I wonder how long it will last .. ??

    1. Alexander Drobyshev
      Alexander Drobyshev 27 July 2020 14: 58
      0
      There were 700 shots in one burst, there was not only a silencer, there was also a Khan's barrel ...
  16. Region-25.rus
    Region-25.rus 27 July 2020 10: 03
    0
    Quote: Mountain Shooter
    Modern design and manufacturing methods (for example, 3-D printers made from metal powders) allow you to do many things that were previously difficult or impossible to do. PBSs have been known for 100 years soon, and there are no limits to perfection. I saw something similar on "Pecheneg" ...

    something like that you could see on the "Badger"))) hi
  17. Fibrizio
    Fibrizio 27 July 2020 13: 39
    0
    Quote: Operator
    This is not a muzzle brake-compensator, but a muffler,

    In Russia, such things are certified precisely as closed-type DTK. So not only in Africa it is a DTK, but also in Russia, if you don’t believe it, enter a request and you will be offered them for purchase (unlike a muffler, it is legal).
    1. Alexander Drobyshev
      Alexander Drobyshev 27 July 2020 14: 55
      0
      Yes, and a muffler is not forbidden to buy, you cannot install ...
    2. sg7s
      sg7s 27 July 2020 15: 02
      0
      Damn, why are you arguing - "muzzle, brake, compensator"? I shot 200, lit a cigarette from the barrel, changed it, and - voila ... Did they shoot themselves when (not from a slingshot)? ... There is no time for the DTK ... Even from a drill, even from an Axu, even from a Makarov, just support , stop (ass when it burns, there is no up to the characteristics ...) .. paid once, so their ...
      1. Fibrizio
        Fibrizio 27 July 2020 15: 05
        0
        When I shoot with my bolt rifle in the summer, I shot a dozen or a half, you look - the haze comes from the barrel, you think, oh, it's a pity, you wait to get cold.
        No one who is responsible for the melt does not beat the barrel.
        1. sg7s
          sg7s 27 July 2020 15: 10
          0
          In vain, this is the norm ... Everything has been calculated, just don’t - "I will save", ... I will not give graphs of heating-cooling, loss of strength-solid TTX - just trust the manufacturer, you have it, IMHO, not one of the last .. ...
          1. Fibrizio
            Fibrizio 27 July 2020 16: 00
            +1
            I have a Czech, but I don't shoot at 100 meters, and my barrel is not varmint, so the pile starts to creep apart. There simply is a slight claim to accuracy, and with decent heat, you can see that it floats.
            1. sg7s
              sg7s 28 July 2020 09: 41
              0
              Norms that "creeps away" and does not start "spitting" Accuracy will tolerate, the main thing is fighting efficiency ... you have good equipment ..
      2. Alexander Drobyshev
        Alexander Drobyshev 28 July 2020 07: 32
        0
        When I shot 2 magazines (60 rounds) in a row with a "bump-fire" for the first time on mine, the varnish boiled on his fore-end, I had to change it to plastic from AK-74M
        Now it stands from FAB Defens, the "tambourine" seems to hold at a time, does not melt, although the carbine itself "boils and gurgles"