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Thread: What caused this

  1. #31
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    Quote Originally Posted by markm View Post
    I've seen it on my gen 2.
    Six of my seven .40 Glocks are Gen2. (I never got used to the finger grooves.) No bulges, ever...

  2. #32
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    If my memory serves me, It was Blazer Brass ammo. Since I don't load 40, I never get a good look at the brass anymore. Maybe I'll shoot a few rounds next weekend to see.
    "You people have too much time on your hands." - scottryan

  3. #33
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    Seen this before. The person who posted said it was range pickup brass - not something they fired. This looks to be a round from a 223cal bang stick used by divers. You get the bulge when the darn thing is not screwed in tight like it should. I had a 223 bang stick back in 1983 when diving around Florida. I made a piece of brass like this once - only not as bad - when some sand got into the threads and I didn't have the chamber section screwed down and seated in tight.

    Kevin

  4. #34
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    I've seen this with dirty open bolt 9mm FA.

    Makes me wonder if this was a very dirty/misadjusted SAW or similar. Not an AR.

  5. #35
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    Quote Originally Posted by pinzgauer View Post
    I've seen this with dirty open bolt 9mm FA.

    Makes me wonder if this was a very dirty/misadjusted SAW or similar. Not an AR.
    I donít know exactly what Iím looking at, but Iíve never seen it with a SAW or Mk46. Neither have user adjustable headspace, if thatís what you're getting at. Maybe if there was a case neck stuck in the chamber, as someone mentioned earlier?
    RLTW

  6. #36
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    I am not familiar enough with the saw other than internet reading to know.

    But really looks like out of battery, and you know the AR won't do this. OOB, anyway.

    Personally, I don't think it was premature extraction. If the residual pressure was enough to swell the case, it would have still had major friction with the chamber almost by definition. And would have ripped the rim off or similar.

    So I'm thinking OOB, and probably open bolt of some kind. (But what?)

    Did not think about bang sticks, back in the day they used 38 special.

  7. #37
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    After some thinking, I donít think a SAW can OOB. The bolt must rotate closed in order for the firing pin to protrude. Iíll have to get my mitts on one to be sure.

    Perhaps a closed bolt gun like an AR or AK with a seized firing pin slam firing?
    RLTW

  8. #38
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    I believe you are correct. It's not a fixed firing pin. And the bolt has to advance to a certain point before it protrudes as I understand it.

  9. #39
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    Quote Originally Posted by 1168 View Post
    After some thinking, I donít think a SAW can OOB. The bolt must rotate closed in order for the firing pin to protrude. Iíll have to get my mitts on one to be sure.

    Perhaps a closed bolt gun like an AR or AK with a seized firing pin slam firing?
    I canít speak to an AK, but the AR cannot have a seized firing pin. If you welded it forward, you would never be able to retract the bolt. It is impossible by design for the firing pin to be anywhere near the breech face until the bolt is well and fully locked up.

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