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correct process for headspacing

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  • croc4
    Senior Member
    • May 2005
    • 569

    correct process for headspacing

    Does anyone have a link to headspacing an Ak?

    I have a go gauge and my ak build does not lock up with the go gauge, I have not removed the extractor from the bolt, is this required?.


    Thanks,

    Croc4
  • #2
    ar15barrels
    I need a LIFE!!
    • Jan 2006
    • 57183

    Your headspace is too short if the bolt will not close on a go gauge.
    You don't need to remove the extractor, but you should slip the gauge under the extractor before you ease it into the chamber.
    Randall Rausch

    AR work: www.ar15barrels.com
    Handguns: www.handgunbarrels.com
    Bolt actions: www.700barrels.com
    Foreign Semi Autos: www.akbarrels.com
    Most work done while you wait on a scheduled shop visit.

    Comment

    • #3
      Rule .308
      Veteran Member
      • Oct 2005
      • 2531

      Originally posted by croc4
      Does anyone have a link to headspacing an Ak?

      I have a go gauge and my ak build does not lock up with the go gauge, I have not removed the extractor from the bolt, is this required?.


      Thanks,

      Croc4
      Randall pretty much covered it but just to clarify what you said, you are saying that your bolt will not close entirely on a Go guage, correct?

      Comment

      • #4
        croc4
        Senior Member
        • May 2005
        • 569

        that is correct, it will not headsapce on the go gauge, I tried the same headspace gauge on a kit that I have not even demilled and it will not headspace on the go gauge also, it locks up fine on an unfired round(I pulled the projectile and popped the primer so it is inert).

        So I'm leaning towards the gauges I have are at the large end maybe?

        Croc4

        Comment

        • #5
          ar15barrels
          I need a LIFE!!
          • Jan 2006
          • 57183

          Originally posted by croc4
          it will not headsapce on the go gauge, I tried the same headspace gauge on a kit that I have not even demilled and it will not headspace on the go gauge also, it locks up fine on an unfired round(I pulled the projectile and popped the primer so it is inert).
          Short headspace is not a problem if it is not effecting the function.
          Go test fire the gun and see how it runs.
          Randall Rausch

          AR work: www.ar15barrels.com
          Handguns: www.handgunbarrels.com
          Bolt actions: www.700barrels.com
          Foreign Semi Autos: www.akbarrels.com
          Most work done while you wait on a scheduled shop visit.

          Comment

          • #6
            swift
            Senior Member
            • Feb 2006
            • 874

            Originally posted by croc4
            that is correct, it will not headsapce on the go gauge, I tried the same headspace gauge on a kit that I have not even demilled and it will not headspace on the go gauge also, it locks up fine on an unfired round(I pulled the projectile and popped the primer so it is inert).

            So I'm leaning towards the gauges I have are at the large end maybe?

            Croc4
            This is how two of my kits were. According to the different ak sites I saw, this is not uncommon.

            Comment

            • #7
              motorhead
              Veteran Member
              • Jan 2008
              • 3409

              make sure your bolt FULLY closes on the inert round. there are all kinds of theorys about guage specs and even how much pressure to put on the bolt during the test. i can promise it won't tighten by firing. as long as the bolt locks fully you should be good. aks are supposed to be safe from firing out of battery but i've seen 2 kb's where the bolt wasn't rotated to full lock. those may have been caused by worn components.
              sigpic Sic gorgiamus allos subjectatos nunc

              Comment

              • #8
                bornproud
                Member
                • Jun 2008
                • 219

                You can always check your fired brass. If you see stretch marks in the rear by the web, your failing headspace.
                I Survived Roe Vs. Wade!!!

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