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Thread: 12.5 midlenth gas port size?

  1. #1
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    12.5 midlenth gas port size?

    I was wondering if there are standard gas port sizes for midlenth gas system 12.5 ( pistol) barrel chambered in .223/5.56?
    Thanks.
    God, Family, Freedom.

  2. #2
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    Nope.


    Sent from my iPhone using Tapatalk
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    Nope 2nd.
    Gettin' down innagrass.
    Let's Go Brandon!

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    You can scroll through the included link and get an idea by assorted brand names and source of measurements.

    https://docs.google.com/spreadsheets...#gid=766121382

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    Quote Originally Posted by bamashooter View Post
    You can scroll through the included link and get an idea by assorted brand names and source of measurements.

    https://docs.google.com/spreadsheets...#gid=766121382
    Maybe I missed it but I didn't see a single 12.5 mid length on that whole list.

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    Quote Originally Posted by JoeBobJoe View Post
    I was wondering if there are standard gas port sizes for midlenth gas system 12.5 ( pistol) barrel chambered in .223/5.56?
    Thanks.
    Probably only 3 companies making midgas 12.5s.
    We use .081"

  7. #7
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    I did mine at .080”, it’s a bit stout. I’d suggest starting at .075” and working up until it works with the ammo you use.
    Chief Armorer for Elite Shooting Sports in Manassas VA
    Chief Armorer for Corp Arms (FFL 07-08/SOT 02)

  8. #8
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    Thanks for the info, I kind of stumbled on the 12.5 midlenth by accident.
    I saw a few midlenth pistols builds on line & it intrigued me. I got a over gassed midlenth barrel sitting around.
    God, Family, Freedom.

  9. #9
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    Quote Originally Posted by Robb Jensen View Post
    I did mine at .080”, it’s a bit stout. I’d suggest starting at .075” and working up until it works with the ammo you use.
    Ok. That .075 is about average on a midlenth 16.
    Thought it be about.085 or more.
    Good to know.
    God, Family, Freedom.

  10. #10
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    Quote Originally Posted by Five_Point_Five_Six View Post
    Maybe I missed it but I didn't see a single 12.5 mid length on that whole list.
    Perhaps so. Didn't scrub the DB. Back to the question. There is no standard.

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