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Thread: Hungarian AK74 barrel gas port question

  1. #1
    Gunco Rookie jackofnone's Avatar
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    Default Hungarian AK74 barrel gas port question

    I recently built a 74 from a K-var kit.
    I bought the barrel from another on-line vendor. When I took it out to test fire it, the recoil was excessive to the point that the bolt carrier was jammed into the Tech-Sight. It was so much that it had to be pried loose.
    I de-pinned the gas block and measured the barrel port,(which I should have done first). The port measured .140", which I know is too large.
    My quandary is what to do. I would like to find a remedy that doesn't involve replacing the barrel. I am thinking of reaming the gas block and inserting a brass plug with the correct diameter hole.

    Any ideas??

    Thanks,

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    White Cracker 4thIDvet's Avatar
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    jack that is interesting. I would hold off on shooting the weapon till the guys can give you a fix for that. Recoil on an AK is kind of mild, that does not sound good. Wish I could help yah but someone here will know what to do.
    "Man needs but two things to survive alone in the woods. A blow up female doll and his trusty old AK-47" - Thomas Jefferson 1781


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    Gunco Member usmc3531's Avatar
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    tap the hole in the gasblock for a set screw, and drill out the center of the setscrew. make several with diffrent size holes till you get it where you want and still cycles

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    No Hope For Me Coils's Avatar
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    tap the hole in the gasblock for a set screw, and drill out the center of the setscrew.
    This
    "Government is not the solution to our problem, government is the problem" Ronald Reagan

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    Gunco Rookie jackofnone's Avatar
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    Yep, That's kinda what I had in mind.
    I found a spec for the 5.45x39 7N6 cartridge which is 0.078" diameter hole.
    I think I will start with that size, and along with one of those buffer inserts. Hopefully that will take care of it.

    One other thing, I mis-spoke, the kit was Bulgarian and not Hungarian, although I don't think that makes any difference.
    I did want to set the record right.

    Thanks again,

    Jack

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    Gunco Member usmc3531's Avatar
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    IMO leave the buffer out atleast until you get the gas where you want it. the only time I use a buffer is if the bolt is jumping the rails

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    Chief Administrator 7.62x39's Avatar
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    Quote Originally Posted by usmc3531 View Post
    IMO leave the buffer out atleast until you get the gas where you want it. the only time I use a buffer is if the bolt is jumping the rails
    +1
    I've seen buffers cause more problems than they cure.
    .

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    GuncoHolic Sprat's Avatar
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    Quote Originally Posted by usmc3531 View Post
    tap the hole in the gasblock for a set screw, and drill out the center of the setscrew. make several with diffrent size holes till you get it where you want and still cycles
    correct solution

    I have never used buffers
    Sprat and sprat1 are one and the same.

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    No Hope For Me 1biggun's Avatar
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    DITTO on the buffer you should not need it . I have used very thin ones on a gun that was built wrong an the carrier came out of the rails but other wise not really needed .

    If your stuck with a over size barrel port restrict the GB port an drill up until the gun cycles the weakest ammo you will shoot .

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