Pennsylvania Firearm Owners Association
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  1. #1
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    Default AR weird problem - sheared extractor pin

    Odd. So took the AR out today and jam after jam after jam: spent shell just stayed in, not even stovepiping. About 50/50 jam vs. cycled properly. Did about 30 and gave up.

    Took her home and disassembled and when I pulled apart the bolt assembly the cause was clear: my ejector retaining pin (#3 below) was split - came out in three pieces. it had sheared off right on both sides, about where it goes through the inner side of the outer tube into the ejector. The ejector itself had tons of play, thus. Probably lucky something worse didn't happen.

    ejector.jpg

    So okay, gotta head to the LGS and get another one (or order it online for $0.95 + way more in shipping)...

    But my real question is why? Any thoughts on what could have caused that? I don't think it's under-lubrication (I run pretty wet)... Just wondering if anyone else has had this and could speculate on why. The only "difference" I can think of is that I tried running some steel-case ammo through it for the first time. Or is it just "stuff happens"... Gun has maybe 1,000 max rounds through it, everything else looks good.
    I must not fear. Fear is the mind-killer... I will face my fear. I will permit it to pass over me and through me. And when it has gone past I will turn the inner eye to see its path. Where the fear has gone there will be nothing. Only I will remain.

  2. #2
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    Default Re: AR weird problem - sheared extractor pin

    Good catch on zeroing in on the issue quickly... and s/b easily corrected. I wonder if the pin failed due to poor quality standards with 'that' part. I've not experienced that problem, but will watch this thread with interest.

  3. #3
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    Default Re: AR weird problem - sheared extractor pin

    Quote Originally Posted by JAKIII View Post
    Good catch on zeroing in on the issue quickly... and s/b easily corrected. I wonder if the pin failed due to poor quality standards with 'that' part. I've not experienced that problem, but will watch this thread with interest.
    Well thanks, but a little hard to miss it when I pushed the pin out and the three little 'bits' went came out!

    It's an Anderson, which typically gets decent reviews on QA so far as I've seen... Could just be one little flaw/bubble in that pin and it hit its 'service life'. Until/unless something else happens, I'm chalking it up to 's**t happens'.
    I must not fear. Fear is the mind-killer... I will face my fear. I will permit it to pass over me and through me. And when it has gone past I will turn the inner eye to see its path. Where the fear has gone there will be nothing. Only I will remain.

  4. #4
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    Default Re: AR weird problem - sheared extractor pin

    My guess is the pin was either too soft or too hard. Keep extras on hand. All of my ARs have hollow grips with a plug for storage. I usually keep and oil bottle or a wrench in it but I guess I should put a cam pin, extractor pin, ejector pin and a could others in each grip as well.

  5. #5
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    Monroeville, Pennsylvania
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    Default Re: AR weird problem - sheared extractor pin

    Probably caused by poor part quality or bad luck, or both.

  6. #6
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    Default Re: AR weird problem - sheared extractor pin

    Part #3 is the extractor retaining pin. Something doesn't add up... I'll play though. If #3 did break I'd say post a pick of the brass.

  7. #7
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    Default Re: AR weird problem - sheared extractor pin

    Order a few of them if they are cheap

  8. #8
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    Default Re: AR weird problem - sheared extractor pin

    Quote Originally Posted by bjmac View Post
    Part #3 is the extractor retaining pin. Something doesn't add up... I'll play though. If #3 did break I'd say post a pick of the brass.
    Yes, extractor retaining pin. I just used the wrong word vs "ejector" retaining pin, no gunsmith I.

    Didn't photo / save the brass.
    I must not fear. Fear is the mind-killer... I will face my fear. I will permit it to pass over me and through me. And when it has gone past I will turn the inner eye to see its path. Where the fear has gone there will be nothing. Only I will remain.

  9. #9
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    Default Re: AR weird problem - sheared extractor pin

    Quote Originally Posted by ItchyTick View Post
    Order a few of them if they are cheap
    Yeah, if I order 'em online and am paying shipping I'll order a few, plus some other various pins and parts while I'm at it...
    I must not fear. Fear is the mind-killer... I will face my fear. I will permit it to pass over me and through me. And when it has gone past I will turn the inner eye to see its path. Where the fear has gone there will be nothing. Only I will remain.

  10. #10
    Join Date
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    Default Re: AR weird problem - sheared extractor pin

    Quote Originally Posted by dkf View Post
    My guess is the pin was either too soft or too hard. Keep extras on hand. All of my ARs have hollow grips with a plug for storage. I usually keep and oil bottle or a wrench in it but I guess I should put a cam pin, extractor pin, ejector pin and a could others in each grip as well.
    I'm guessing too hard / brittle, seeing as it was a clean break/shear vs. bend or torque...
    I must not fear. Fear is the mind-killer... I will face my fear. I will permit it to pass over me and through me. And when it has gone past I will turn the inner eye to see its path. Where the fear has gone there will be nothing. Only I will remain.

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