Headspace Gauge Go-no-Go?

Discussion in 'AR-15 Discussion' started by rccalzadilla, Aug 22, 2011.

  1. rccalzadilla

    rccalzadilla New Member

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    Should I get a Clymer Headspace Gauge for 5.56 NATO/.223?
    If there is a problem, what do I do? Return the whole upper and bolt carrier assembly?
    Will I be able to determine which upper component is the problem?
     
  2. Sniper03

    Sniper03 Supporting Member Supporter

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    I would suggest the Forster Gauges. They are around $30.00 each. There are three! Go / No-Go / Field.
    If you are only wanting one weapon checked do not spend the money go to a reputable shop and have them check it for you.
    With the:
    "Go Gauge" the Bolt and Bolt Carrier should go all the way into Battery and
    completely lock up!
    "No-Go Gauge" the Bolt and Bolt Carrier will go forward but not completely
    lock up into Battery! Should it lock up into Battery it is not always a lost
    cause. Since Mil-Spec Tolerances vary you could for example have the
    Barrel Extension which is a few thousandths over and a Bolt that is several thousandths under. Both are acceptable as the Mil-Spec tolerances by them selves but when you match the two together you get excessive head space problems that allows the No-Go Gauge to go completely into Battery. You can sometimes change the Bolt "Only" and reduce the tolerances and now the No-Go will Not Go into Battery and you have corrected the problem.
    If the Field Gauge Goes into battery do not shoot the rifle. If you need additional clarification please PM me.

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  3. Quentin

    Quentin New Member

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    Excellent info as usual, Sniper!


    ETA:
    I will admit I have not checked headspace on my builds. :eek: (Since it's rarely a problem with quality components plus I do have matching brand name bolts/uppers.) I do measure the fired cases as a precaution. If I stumbled across some gauges I would check of course.
     
    Last edited: Aug 22, 2011
  4. Sniper03

    Sniper03 Supporting Member Supporter

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    Quentin,

    Thank you for your great Threads also. I do not always respond but I read everyone of them!
    One of the most important Gauges is the Throat Erosion Gauge also!
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  5. Quentin

    Quentin New Member

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    Thanks, Sniper!

    Well I must say I haven't considered throat erosion yet but no doubt when my round count gets well over 10K it's another thing to think about when evaluating my barrel. I know I should check headspace now, I should ask around with the local guys.
     
  6. rccalzadilla

    rccalzadilla New Member

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    Thanks again, gentlemen!