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Thread: firing from an open bolt

  1. #1
    Administrator pirate56's Avatar
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    Default firing from an open bolt

    I took my mg 42 semi auto build out to test fire today and had a round fire while extracting / ejecting. The mg 42 extractor holds the case tightly untill the bolt is all the way back when the ejector extension hits the buffer and knocks the case down and out of the gun. A live round was in the bolt when I retracted the bolt and the firing pin hit the buffer ignighting the round. There was a pop and smoke came out of the receiver. I found the case and bullet in the receiver along with most of the unburned powder. it seems that as soon as the case popped the powder went out. nothing was damaged except the case.
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    Gunco Apostle konrue66's Avatar
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    Get on your knees and thank GOD you are okay.
    Gunco Member 2241
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    U.N.C.L.E. Illya Kuryakin's Avatar
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    I don't know everything, but shouldn't the rollers being pushed inward by the rails have prevented the striker/firing pin from moving forward and thus preventing contact with the primer in the round? I confess I don't know the setup for a semi MG42 bolt - haven't gone down that road.


    Did I do that?

  4. #4
    BANNED Patriot Game's Avatar
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    man your LUCKY your not dead! take to a gun smith and ask IF you don't know. it's not worth your life!

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    Throbbing Member scheistermeister's Avatar
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    i thought open bolts were a no-no?


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    GuncoHolic kernelkrink's Avatar
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    The gun does not fire from an open bolt, he retracted the bolt with a live round in the chamber. The round was retained on the boltface by the extractor. When the bolt hit the buffer at the end of it's rearward travel, the firing pin was hit by that buffer and the round fired outside of the chamber. Either there is a malfunction of some sort, or that is a serious design flaw.

  7. #7
    Indian Admin Winn R's Avatar
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    Pirate -- I've got a mg42 but not assembled.

    I've wondered about that set up.
    There is no nonsense so errant that it cannot be made the creed of the vast majority by adequate governmental action. -- Bertrand Russell


    "Never attribute to malice that which can be adequately explained by stupidity." Robert J. Hanlon

  8. #8
    Administrator pirate56's Avatar
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    Winn, I am documenting my build on the mg 42 site:
    http://www.salt6.com/pirates%20build.htm
    I have the receiver done, a fairly simple tig job. the other conversion parts are not hard, but no drawings are available. I am workong all this out now. It is a worthwhile build.

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    Throbbing Member scheistermeister's Avatar
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    Quote Originally Posted by kernelkrink
    The gun does not fire from an open bolt, he retracted the bolt with a live round in the chamber. The round was retained on the boltface by the extractor. When the bolt hit the buffer at the end of it's rearward travel, the firing pin was hit by that buffer and the round fired outside of the chamber. Either there is a malfunction of some sort, or that is a serious design flaw.
    gotcha! i guess i miss interpreted the title


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