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Firearm and Gun Forums Firearm and Gun Forums Firearms Rifles Accidentally purchased a Go gauge, but forgot a no-go gauge. Do I have to have both?

  • Accidentally purchased a Go gauge, but forgot a no-go gauge. Do I have to have both?

     Luna updated 11 months, 3 weeks ago 2 Members · 2 Posts
  • Luna

    Member
    December 13, 2019 at 5:27 pm

    First time building my own upper and I purchased a Ballistic advantage barrel so I’m not massively worried, but do I need both gauges or is the one enough to tell me that the gun is safe?

    I thought I was buying a set, but accidentally only purchased a go gauge.

  • captainsheepherder

    Guest
    December 13, 2019 at 5:27 pm

    Unfortunately the no-go gauge or a field gauge is the important one. A go gauge is really just a cartridge

  • Thrall_babybear

    Guest
    December 13, 2019 at 5:27 pm

    You don’t really need either one.

    New barrel + new bolt = fine

    New barrel + old bolt = fine

    Old barrel + new bolt = fine

    Old barrel + old bolt = check headspace (We’re also talking about thousands of rounds = old. There has to be a not insignificant amount of wear on both ends)

  • snowbrdd

    Guest
    December 13, 2019 at 5:27 pm

    Slap a piece of scotch tape on the back of the go gauge and you’ve got a no go gauge. A lot of people have done that to save on costs. Or look at the dimensional differences between the two and chop up a small piece of a feeler gauge. Make sure you test with the extractor removed.

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