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Thread: Mid length Carbine

  1. #11
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    Quote Originally Posted by Abraxas View Post
    Anyone, anyone?
    I guess he would have to open the gas port. It is really about pressure and volume. When the dwell is decreased, so is the volume. The natural conclusion is to compensate by opening the gas port in size to counteract the shorter dwell.

    Anybody have one in which they can measure the size of the gas port?

  2. #12
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    I have to say that while I appreciate what has been posted, I am disappointed with how little info has been given to this thread
    "Intelligence is not the ability to regurgitate information. It is the ability to make sound decisions on a consistent basis "--me

    "Just remember, when you are talking to the average person, you are talking to a television set"--RDJB

    One Big Ass Mistake America

  3. #13
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    This is probably not the information you want either but oh well. If you want it cut down to 14.7 just do it. If you have a short stroking problem have your shop open the gas port or use a lighter buffer. I really do not think John Noveske would be making them if they were problematic. Do you?
    The man on top of the mountain didn't fall there.

  4. #14
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    Quote Originally Posted by UPSguy View Post
    This is probably not the information you want either but oh well. If you want it cut down to 14.7 just do it. If you have a short stroking problem have your shop open the gas port or use a lighter buffer. I really do not think John Noveske would be making them if they were problematic. Do you?
    I would agree I was simply looking for the hows and whys for a better personal understanding. I think that Failure2Stop stated better what I was looking for.
    "Intelligence is not the ability to regurgitate information. It is the ability to make sound decisions on a consistent basis "--me

    "Just remember, when you are talking to the average person, you are talking to a television set"--RDJB

    One Big Ass Mistake America

  5. #15
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    Quote Originally Posted by Failure2Stop View Post
    Does the longer lock time of a middie reduce the dwell time necessary to ensure proper function
    Yes.

    It appears that your understanding of the gas system is very good.
    Randall Rausch
    AR15 Barrel Guru
    California Precision Rifle Club founding member

  6. #16
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    Quote Originally Posted by zenmastar View Post
    It is really about pressure and volume. When the dwell is decreased, so is the volume. The natural conclusion is to compensate by opening the gas port in size to counteract the shorter dwell.
    Very good explanation as well.
    Randall Rausch
    AR15 Barrel Guru
    California Precision Rifle Club founding member

  7. #17
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    Quote Originally Posted by Abraxas View Post
    I have to say that while I appreciate what has been posted, I am disappointed with how little info has been given to this thread
    Perhaps ask a more specific question?

    You have not been (purposely) misled, but there are a whole bunch of people that don't fully understand all the dynamics of making an AR run good and those people may also believe that 14.5" mid-lengths won't run.
    Many people assume that the "patches" applied to carbines are also necessary on mid-lengths.
    If you are running an extra heavy buffer on a 14.5" mid-length barrel, you may experience short stroking.
    If you are running wimpy wolf ammo in cold weather, you may experience short stroking.
    When properly setup, maintained and fed, 14.5" midlengths run great.
    I have cut down a bunch of 16" mid-lengths and have yet to hear of any problems with them so I must have it figured out...
    The amount that the gas port gets opened up will depend on how big the port was to begin with as well as other factors in the build.
    There's not one size that's right for all mid-length 14.5" barrels.
    It gets compounded when people run different buffers/carriers/muzzle devices.
    Randall Rausch
    AR15 Barrel Guru
    California Precision Rifle Club founding member

  8. #18
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    Excellent info, Randall. Thanks.

    BTW, I was reading on TOS you fell off the radar or something. All O.K.?

  9. #19
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    Quote Originally Posted by AR15barrels View Post
    Perhaps ask a more specific question?

    You have not been (purposely) misled, but there are a whole bunch of people that don't fully understand all the dynamics of making an AR run good
    Thank you for the info. You are absolutly correct about the more specific question part. I realized that after I read some of the others posts, I am just slow to pick up sometimes. I never thought that I was being misled. I am one of those that do not fully understand all of the dynamics of the AR system, that is why I posted this thread (Ill phrased question as it was). Thanks again to all who took the time to answer.
    "Intelligence is not the ability to regurgitate information. It is the ability to make sound decisions on a consistent basis "--me

    "Just remember, when you are talking to the average person, you are talking to a television set"--RDJB

    One Big Ass Mistake America

  10. #20
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    Noveske Afghan 14.5 Midlength Barrel. It has a 0.082" gas port drilled at Noveske toy factory. This rifle runs flawlesly with a H2 buffer and low powered ammo like AE and WWB 55gr. I cant speak of Wolf as I dont shoot steel cased ammo in my SS bbls

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