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Thread: Bent Firing Pin?????

  1. #11
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    Outside of them bending due to the Firing Prin Retaining Pin breaking, I have never seen an AR Firing Pin go bad.

    I have seen the tip deformed by a pierced primeer but it still worked.
    My brother saw Deliverance and bought a Bow. I saw Deliverance and bought an AR-15.

  2. #12
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    Here you go.



  3. #13
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    Bolt carrier has a fully shrouded firing pin. For what ever its worth I would guess a defective firing pin.
    Interesting problem would like to know for sure what actually was the cause.

  4. #14
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    Well, thanks for all the help guys, my friend never showed with the new pin, so I guess it's a good thing I trued it back up. I'll go out tomorrow and see if I can get it to happen again. If I break something I guess it's ok, as my new years resolution is to build or buy more rifles anyhow. I did a google search and got a link to a "Calguns" thread that was titled, "Why will an AR firing pin bend", but the link would'nt work.
    Maybe I'm asleep right now and this is actually a dream. I say this because I have dreams where like my guns will break for no logical reasons.
    Well, if I do damage the internals I'll just replace everthing with BCM parts. I'de like to try the Fail Zero products but I can really afford them right now.

  5. #15
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    I'd call Bushmaster. Perhaps they made more than just one firing pin with that blend of metal and it would be of interest to them to find the cause.


    Anyways, order one off BCM and be happy again.

  6. #16
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    Quote Originally Posted by Volucris View Post
    I'd call Bushmaster. Perhaps they made more than just one firing pin with that blend of metal and it would be of interest to them to find the cause.


    Anyways, order one off BCM and be happy again.
    I feel dumb now, I should have thought of that. Roger Wilco. Out.
    I'll wait til' after Christmas. In theory any how, the FP should not have been able to bend at all, seeing as how the pin must be in pefectly lateral symmetry, in order to fit to and fro' inside the FP bore of the bolt. I know this because I had to fit the pin to the bolt. When it was bent it would not fully insert without force, which I was not about to try. I fitted the pin with care, then polished the worked area with 1600 grit sand paper, but only ever so gently, to correct any uneven surfaces. I maybe removed .0003. My calipers broke and I can afford new ones right now. Then it finally looked like new and dropped right in, and slide right out.
    Perhaps it is an issue of Harmonics causing stress deformation over an extended period of time, and due to poor metalurgy. Anybody can make a firing pin, and though I am happy with this rifle, i am sure Bushy just gets their Firing Pins from the lowest bidder. I believe it is time to try an M-16 Bolt Carrier. I forgot to mention that this gun has an H buffer in it, might have changed the Harmonics.But that was installed last Winter. Well, thankfully their are so many things to learn about working on guns that the fun never ends.
    Last edited by geminidglocker; 12-24-09 at 10:54.

  7. #17
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    The only other possible explanation is there is a problem with the channel inside the bolt.
    My brother saw Deliverance and bought a Bow. I saw Deliverance and bought an AR-15.

  8. #18
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    Quote Originally Posted by Heavy Metal View Post
    The only other possible explanation is there is a problem with the channel inside the bolt.
    I inspected the Bolt quite thoroughly, but you can never be to sure so I'll tear it down right now and inspect again. When I worked in a Lab at Vermont Butter and Cheese Co. I always performed each test 3 times. It never hurts to go back and look for what you might have missed. Per that, the bolt itself would be the next logical place to look, since it covers the affected area of the pin. Thanks for the tip. I'll write more when I complete me bolt inspection. I will write more later. I'm not doing anything for Christmas, so at least now I have a good safe time to wring out any flaws in the system, and replace/upgrade parts as needed. Hoping for some post Christmas deals on AR stuff after the Christmas season.

  9. #19
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    Can you post some closer pictures of the firing pin? It definitely is fatigue failure but are there any blemishes on the surface of the pin? Is the pin the proper length?

  10. #20
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    Quote Originally Posted by Linus View Post
    Can you post some closer pictures of the firing pin? It definitely is fatigue failure but are there any blemishes on the surface of the pin? Is the pin the proper length?
    I'll get around to it, I promise. My camera is not the best, 99.00 wal-mart kodak. I unfortunately cannot do any more gun work today, as an old friend stopped in, and since we each ain't got much family, I put the guns away, hidden, locked, etc: See, we intend to partake in Alcohol consumption tonight, so firearms will not be part of the equation. I'll get back to this thread in a couple of days, when my head does'nt hurt. Das Vedania.

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