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Thread: Measuring the barrel gas port size

  1. #101
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    Yeah, that's a pretty hot gas port...

    I've seen a couple of places online which offer a service whereas they insert a special bushing to close it off.

    But I don't know if its worth it unless its some special barrel and/or caliber/type you can't buy again. The way FN churns those things out its easy to find a replacement.

  2. #102
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    0.086 is the largest I've measured, and that was a 10.3" LW barrel.

  3. #103
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    that's a shame, it wouldn't be a horrific size for a 11.5". Still there's enough art left in gas port sizes that you might be OK. If not, how are you for SBRs?

  4. #104
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    Maybe I'll put it together with an H3 and blue SpringCo and see what it looks like cycling on high speed camera. If it's too crazy, I'll pull it and throw it on the lathe.

    That's insane big, though. I may just grab another barrel.
    Duane Liptak, Jr.
    Executive Vice President
    Magpul Industries

    info@magpulcore.com

    This is a personal account linked to a personal e-mail. Company affiliation and titles are provided purely for transparency requirements of the host site. Although factual company information may be shared through this account, any opinions expressed are solely those of the account holder, and not necessarily those of Magpul Industries or subsidiaries.

  5. #105
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    I for one wish you would try it and post the video so we can all learn from it.

  6. #106
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    Quote Originally Posted by az doug View Post
    I for one wish you would try it and post the video so we can all learn from it.
    Well, I said "what the heck" and put the barrel on last night. I have a hard time believing that this will work out to any degree of satisfaction, but it might be interesting. I have a strong feeling I'll be changing this barrel at some point soon after the build, but I'll have some data when it's over.
    Duane Liptak, Jr.
    Executive Vice President
    Magpul Industries

    info@magpulcore.com

    This is a personal account linked to a personal e-mail. Company affiliation and titles are provided purely for transparency requirements of the host site. Although factual company information may be shared through this account, any opinions expressed are solely those of the account holder, and not necessarily those of Magpul Industries or subsidiaries.

  7. #107
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    If it doesn't and you don't SBR it you still have some options.

  8. #108
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    Quote Originally Posted by rob_s View Post
    While I am generally opposed to the amount of attention paid to this level of minutiae, it strikes me that if we're going to discuss it so often we should determine how people are making their measurements and assumptions.
    I like minutiae.
    I use gauge pins in 0.001" steps.
    My pins are minus pins, not that it matters if we are only measuring to the nearest 0.001"...



    I have documented the profile, weight and gas port dimensions on well over 1000 barrels.
    In the case where I find different port sizes, I log them.
    In the case where I find the same dimension, I log a couple and then quit logging them.
    You learn a lot when you gather a lot of information like this...

    Randall Rausch
    AR15 Barrel Guru
    California Precision Rifle Club founding member

  9. #109
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    Quote Originally Posted by AR15barrels View Post
    You learn a lot when you gather a lot of information like this...
    yep, you learn a lot of shit that is utterly inconsequential and has zero bearing on anything for 99% of shooters, let alone the 99% of purposeless gun owners.

  10. #110
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    Quote Originally Posted by rob_s View Post
    yep, you learn a lot of shit that is utterly inconsequential and has zero bearing on anything for 99% of shooters, let alone the 99% of purposeless gun owners.
    Even though it has no bearing, it's still good to know who is more consistent, and who have crappy QC...
    Randall Rausch
    AR15 Barrel Guru
    California Precision Rifle Club founding member

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