“Builder” Spec Headspace Gauge Myth?
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    “Builder” Spec Headspace Gauge Myth?

    Currently have 3 fairly new K’s that will not close on a Manson CIP “Go” gauge but eat rounds with no problem. I know they are fully functional. I have heard of a mythical “Builder” spec gauge that some companies use but have never seen one. Is this something like a unicorn tear or is there such a thing?
    Big thanks to Moses1986, 10Gauge, Pookie and NFA ARMS.
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    I have never heard of a "builder spec gauge". ?

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    I have heard only a couple mentions of such a thing existing. If there is no such thing I would then only assume they are building them really tight and as long as there is full lug lock-up on a live round of different types they ship. Or their CIP gauges are slightly smaller in spec than mine. I know it’s not uncommon for someone to own one with this same scenario as the 3 I have. Probably many out there that owners have just never checked. Most guys are more worried about mags and ammo than spending a chunk on headspace gauges.
    Big thanks to Moses1986, 10Gauge, Pookie and NFA ARMS.
    Thank you to all who served.

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    That's weird, maybe someone is confusing a field gauge? But even if they are it's not going to be tighter clearance?
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    I think the GO gauge force spec is 40 lbs> max to turn the bolt head to lock up

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    Definitely a myth...and I have never seen them being used by unqualified personnel.

    pics / vid required for validation

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    I have had multiple builders tell me that they set headspace just ever so slightly tight and that it closes on a live round every time.
    WTB:

    Russian Type 1 or 2 parts/kit

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    Quote Originally Posted by evolixsurf View Post
    I have had multiple builders tell me that they set headspace just ever so slightly tight and that it closes on a live round every time.
    that’s how I set mine, especially the .223’s. All my .223 factory ak’s were tight from the factory (and still are, many rounds later), so that’s how I do em at home

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    I have a general headspace question. I own 2 AKs, one runs perfectly - in it the cartridge groove & base lip only - protrude from the breach.

    *problem AK: Almost an eighth of an inch MORE of the cartridge protrudes from the breach - but the bolt closes completely on it - Is this normal ?

    I have had feeding & ejection problems with it - & I am suspicious of the cartridge protruding this far. In my "failure to eject" spent shells are removed from breech - but stay loose in the receiver - & prevent proper feed. It does eject live rounds when cycled by hand.

    Stumped - Like to know if cartridge depth in barrel matters ? or if I should concentrate on magazine problems (it is a factory made Single stack AK) which is OK with me - just needs to work reliably.

    Thanks up front for suggestions.
    Last edited by MR - E; 05-29-2019 at 10:58 AM.
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    Any pics? Headspace ok? Too much case hanging out spells RUPTURE.
    Big thanks to Moses1986, 10Gauge, Pookie and NFA ARMS.
    Thank you to all who served.

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    MR-E, that doesn't sound right at all. Where are you located in north Georgia? I'm in Cherokee County and would be happy to check the headspace if you want.
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    Quote Originally Posted by MR - E View Post
    I have a general headspace question. I own 2 AKs, one runs perfectly - in it the cartridge groove & base lip only - protrude from the breach.

    *problem AK: Almost an eighth of an inch MORE of the cartridge protrudes from the breach - but the bolt closes completely on it - Is this normal ?

    I have had feeding & ejection problems with it - & I am suspicious of the cartridge protruding this far. In my "failure to eject" spent shells are removed from breech - but stay loose in the receiver - & prevent proper feed. It does eject live rounds when cycled by hand.

    Stumped - Like to know if cartridge depth in barrel matters ? or if I should concentrate on magazine problems (it is a factory made Single stack AK) which is OK with me - just needs to work reliably.

    Thanks up front for suggestions.
    With the weapon completely unloded, take the bolt out of the bcg, put it on the rails, push it into the chamber by rotating it into the locking lugs of the trunion. Is it almost tight when you push and pull The bolt while in the locking lugs/ barrel? Compare it with your other one.
    WTB:

    Russian Type 1 or 2 parts/kit

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    NO such thing as a " builder spec" headspace gauge. Headspace is a SAAMI specification. You have GO, NO GO and FIELD. NOTHING ELSE.

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    Quote Originally Posted by Kalashnikov-kid View Post
    Headspace is a SAAMI specification.
    There are other organizations that set headspace specifications as well. My 7.62x39 East German gauges were made before the wall came down. No doubt they had nothing to do with SAAMI. Regardless, they're all so close that there really isn't a measurable difference in the finished product.
    Rights are inherent. They do not come from another's wallet.

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    Quote Originally Posted by Kalashnikov-kid View Post
    NO such thing as a " builder spec" headspace gauge. Headspace is a SAAMI specification. You have GO, NO GO and FIELD. NOTHING ELSE.
    Headspace is set with SAAMI in the U.S. and CIP over the pond.
    Big thanks to Moses1986, 10Gauge, Pookie and NFA ARMS.
    Thank you to all who served.

 

 

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