So, how over gassed would this be?
Results 1 to 12 of 12
  1. #1
    Senior Member

    Member #
    62357
    Join Date
    Mar 2019
    Location
    St. Petersburg
    Posts
    175
    Liked
    188 times

    So, how over gassed would this be?

    I saw this gun on GB a few months back and saved a few pics.

    Has anyone here ever tried the "no gas ports at all" parts combo pictured here? Do the shell casings eject at a FPS rate higher than the projectile and rocket into low-earth orbit?

    pix809185291.jpg

    pix056073523.jpg

    pix903227021.jpg

  2. #2
    Super Moderator
    Supporting Member

    Member #
    7125
    Join Date
    Aug 2007
    Location
    Dark Side Of The Moon
    Posts
    24,379
    Liked
    11197 times
    What the hell?
    I hate to advocate drugs, alcohol, violence, or insanity to anyone, but they've always worked for me.
    Hunter S. Thompson

  3. #3
    Senior Member

    Member #
    62357
    Join Date
    Mar 2019
    Location
    St. Petersburg
    Posts
    175
    Liked
    188 times
    Quote Originally Posted by JoeMomma View Post
    What the hell?
    I think I was searching for Chinese rifles that day and came across this gem. Pretty sure it's got an East German AKM gas tube (no gas ports) combined with a Chinese gas block (also no gas ports).

    This is the new "high speed/low drag" mod all the serious AK operators are using now. More gas pressure = MORE POWER

  4. Remove Advertisements
    TheAKForum.net
    Advertisements
     

  5. #4
    Technical Advisor

    Member #
    2371
    Join Date
    Aug 2006
    Location
    Columbus, Ohio
    Posts
    14,495
    Liked
    3239 times
    The unvented gas tube and gas block would have little effect on the gas flow/pulse.
    The gas pulse is in fractional second duration.

  6. #5
    Senior Member

    Member #
    62357
    Join Date
    Mar 2019
    Location
    St. Petersburg
    Posts
    175
    Liked
    188 times
    Quote Originally Posted by AKBLUE View Post
    The unvented gas tube and gas block would have little effect on the gas flow/pulse.
    The gas pulse is in fractional second duration.
    I'll try this setup at the range and see how it goes and report back.

  7. #6
    Senior Member

    Member #
    20323
    Join Date
    May 2011
    Posts
    4,084
    Liked
    1046 times
    What’s the diffeeence between an akm and ak47 gas system(other than gas tube vents)?
    WTB:

    Russian Type 1 or 2 parts/kit

  8. #7
    Technical Advisor

    Member #
    2371
    Join Date
    Aug 2006
    Location
    Columbus, Ohio
    Posts
    14,495
    Liked
    3239 times
    AK47 is vented in the tube., AKM vented in the gas block.
    OP's picture shows no vents.
    Not a real issue in function.

    Some of the current Saiga's are totally unvented.
    Last edited by AKBLUE; 06-10-2019 at 07:23 PM.

  9. #8
    Senior Member

    Member #
    60509
    Join Date
    Jul 2018
    Posts
    107
    Liked
    51 times
    It probably just ejects the shells at a slightly faster velocity and hits the trunnion a little harder. It wouldn't have any effect on bullet velocity because even in a vented rifle the bullet has long left the barrel before any gas would vent out of any gas ports.

    Now the extra force on the bolt would increase felt recoil a bit, and I imagine that the gas tube would get a lot hotter because the gasses wouldn't have anywhere to vent other than back into the receiver. So you'd just be making the weapon a little more uncontrollable.

  10. #9
    Technical Advisor

    Member #
    2371
    Join Date
    Aug 2006
    Location
    Columbus, Ohio
    Posts
    14,495
    Liked
    3239 times
    There will be no additional force on the piston or carrier.
    The gas pulse is in microseconds.
    The fluted gas tube has no capacity to create gas pressure.
    The gas force is created inside the gas block in the short distance of the forward edge of the piston to the gas chamber in the block.
    Last edited by AKBLUE; 06-13-2019 at 04:16 PM.

  11. #10
    Senior Member

    Member #
    26909
    Join Date
    Oct 2014
    Posts
    692
    Liked
    303 times
    That gas tube looks like it is so tight onto that gas block that I bet it couldn't be removed without pressing the block forward. On the plus side, no wiggle in the gas tube.

  12. #11
    Senior Member

    Member #
    62357
    Join Date
    Mar 2019
    Location
    St. Petersburg
    Posts
    175
    Liked
    188 times
    If gas ports serve no purpose then why were they put there in the first place?

    Doesn't make much sense to add another step in the design and production process for a completely useless feature.

    I'm assembling some leftover parts for a Khyber rifle ATM and I'm using the exact opposite setup pictured above - a vented Romanian AKM gas block and a vented Hungarian gas tube. I doubt it will mess anything up since the Hungarian AKM's were built like this from the factory. Either the Hungarians were trying to bleed off more gas or just felt like producing gas tubes with rows of vents in them purely for aesthetic purposes.

  13. #12
    Technical Advisor

    Member #
    2371
    Join Date
    Aug 2006
    Location
    Columbus, Ohio
    Posts
    14,495
    Liked
    3239 times
    An AK will operate the same without the gas tube. There are videos on the www.
    The Hungarians did not fully adopt all of the sovietAKM changes.
    They kept the AK47 vented gas tube and adopted the vented gas block.
    They did not adopt the lightening mill work cuts on the gas block or the front sight base.

    It seems that the venting of the gas system assisted in heat dissipation.

    https://youtu.be/xCgmfbAbP-Q
    Last edited by AKBLUE; 06-13-2019 at 04:17 PM.

 

 

Sponsors

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Search tags for this page

There are currently no search engine referrals.
Click on a term to search our site for related topics.