Gas tube measurement please

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  • cb4017
    Warrior
    • Dec 2016
    • 183

    Gas tube measurement please

    Anyone have a new gas tube laying around that can take a measurement for me? I'd like to know what the diameter should be of the "mushroom" end that fits into the gas key.

    One of my new builds is having short stroking issues. I had used an old, worn gas tube and measured it at .175". I have another used gas tube that measures .180".

    I'm curious as to what that measurement would be on a new tube. Could not find that information online for some reason.

    Thanks!
    Cliff
    USN Ret., FPD Ret.

    Dues Vult
  • LRRPF52
    Super Moderator
    • Sep 2014
    • 8569

    #2
    I just measured two samples, both used.

    One of them has thousands of rounds on it.

    Both are .180".

    Not all gas tubes are created equally.
    Last edited by LRRPF52; 11-27-2017, 12:09 AM.
    NRA Basic, Pistol, Rifle, Shotgun, RSO

    CCW, CQM, DM, Long Range Rifle Instructor

    6.5 Grendel Reloading Handbooks & chamber brushes can be found here:

    www.AR15buildbox.com

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    • cb4017
      Warrior
      • Dec 2016
      • 183

      #3
      Perfect! Thank You. The tube that measures .175" is in the trash.
      Cliff
      USN Ret., FPD Ret.

      Dues Vult

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