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Thread: HAS THIS EVERY HAPPEN TO YOU?

  1. #1
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    HAS THIS EVERY HAPPEN TO YOU?

    Went to the range today with my AR15. While firing had a major stoppage. The firing pin retaining pin broke. The broken remnant of the pin wedged between the upper receiver and the bolt carrier, binding the bolt carrier in the receiver. The bolt had extracted a shell and stopped with the neck of the shell in the chamber. Neither the charging handle nor the forward assist would move the bolt carrier. I had to separate the upper and lower receivers to push the bolt carrier forward. Once the carrier moved forward enough for the retaining pin to clear the ejection port, I pushed the remnant/retaining pin in and was able to remove the bolt carrier from the upper. The remnant left a scrape in the upper about an inch long from the ejection port back. No other damage was done to the rifle. Tried to order a new firing pin retaining pin. Brownells and Bravo Co out of stock. Placed an order with KNS Precision for two of their machined pins. Hopefully they have them in stock. Except for getting lost, I didn't think the retaining pin would break. Its a good idea to have some spares.

  2. #2
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    brownells does have some do a search for firing pin retaining pin. I just bought some.

    Matt

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    You're talking about that cotter pin right?

    I can't imagine how that would break. Do you know what caused that to happen?

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    Thanx Glockshooter. Just ordered 2 firing pin retaining pins from Brownells. As for what cause the pin to break, I don't know. I was firing XM193 through my LWRC M6A2 upper.

  5. #5
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    I always wondered how often the firing pin retaining pins broke. This is the first time I have heard of one breaking.

    What type of gun(bolt carrier group) did it come from?

    My primary 6920 has a KNS perma-pin in it, not that I ever thought I would need it, but just to keep Murphy off my back.
    Praise be to the LORD my Rock, who trains my hands for war, my fingers for battle. Psalm 144:1

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  6. #6
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    I can honestly say that I have never heard of a firing pin retaining pin breaking. Out of curiousity was this all pieced together or was the BCG purchased together. What manufacture was this?



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  7. #7
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    I've seen several broken firing pin retaining pins (FPRP), nearly all from a single manufacturer (usual suspect). Some others were from elsewhere lower-end. All were broken in the middle. All were in unshrouded carriers and subject to hammer drag.
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    that happened to me back in May as well. this is what i posted on another forum, and the response was it "was not unusual."




    on a lark, I decided to clean my High Power national match gun tonight before a CMP Clinic tomorrow. It's been functioning so well for so long, I've really been loathe to screw with it. Anyway, I removed the firing pin retaining pin, then stuck my finger in to grab the firing pin and it felt odd. after a little tugging, it came out, along with something unexpected. Upon further inspection, it turned out to be one leg of the firing pin retaining pin which as you can plainly see, had broken off and been captured in between the two stops on the firing pin.

    God only knows how long it had been in there. The last time I cleaned it was June of '07, which was 1135 rounds ago (1125 of which were fired in HP matches). And I've been dry firing at home quite a bit too, trying to build my standing position. I couldn't begin to guess how many snaps it's taken.

    Obviously, I'm pretty lucky it didn't screw up a string. I'm really pretty surprised it hung in there like that and didn't fall down into my trigger group at the leg match two weeks ago.

    Rifle is about a 6 yr old Rock River NM. It's seen 2884 rnds total in matches, and probably another 1000 rnds or so from the bench before I got started in HP seriously.

  9. #9
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    Quote Originally Posted by Dave L. View Post
    I always wondered how often the firing pin retaining pins broke. This is the first time I have heard of one breaking.

    What type of gun(bolt carrier group) did it come from?

    My primary 6920 has a KNS perma-pin in it, not that I ever thought I would need it, but just to keep Murphy off my back.
    It came out of a new LWRC bolt carrier in a M6A2. I ordered some KNS pins along with some standard pins.

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    ***********end of line
    Last edited by Toten Kopf; 01-14-09 at 07:19.

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