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Thread: Colt M4 Ejecting Into Receiver

  1. #21
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    Had a Bushmaster that was like this. Saw more like it when I sold guns. So Colt isn't the only one that lets things out like this from time to time. In fact I think ALL the BMs at that time were guilty of this.

  2. #22
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    isn't that the new bolt group that is ejection side switchable...

  3. #23
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    I've done this before in one of my rifles. (I'm an over 110GT score 03, just not a vigilant one apparently. ) I didn't think you could do this until it happened. The make of my bolt and carrier is LMT.

  4. #24
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    I have no idea how long it took me to figure out that the bolt couldnt (or at least shouldnt) be able to be assembled to the carrier backwards. I may have been a civy when I learned that.

    Is it indeed a colt bolt? Back in the late 90s I knew of a guy that beefed up his bolt cleaning the carbon off with a dremel. To avoid a statement of charges (he already had one pending for a smashed set of nvgs) he stuffed in a commercial bolt he bought downtown over lunch break. Could a commercial bolt of some type have found its way in?
    Last edited by sgtrock82; 10-11-11 at 14:40.

  5. #25
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    Supposedly came straight from the armory but anything is possible.

  6. #26
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    Quote Originally Posted by marco.g View Post
    I thought the cam pin hole in the bolt and the cam pin itself are tapered so that you cant install the bolt in that orientation?

    The wrong end of the hole is swaged. Perhaps this bolt wasn't sufficiently done so.

  7. #27
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    Heh. When I got to the pictures I got a stupid look and a chuckle. I thought this was an urban legend.

    I guess anything is possible, and now I've actually seen it. It is still pretty crazy. I think as an NCO I would probably be humiliated to find out one of my Marines had this issue. Even if it wasn't his fault, I'm pretty sure I'd "WTF, over".

  8. #28
    Dano5326 Guest
    A mil bolt will be marked MPC or MPF, MP-something if you find some 60's parts

  9. #29
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    Thanks for posting this. When describing field strip and inspection procedures to my customers I always instruct them to be mindful of proper orientation of the bolt. I've never run across a bolt that the cam pin could be inserted from either side, so it's good to know they're out there. I'll definitely be looking for these now!

    When I read the thread title, it's all I could think of was, "wow, how could the bolt be installed 180-degrees in the wrong direction?"

  10. #30
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    Quote Originally Posted by Tweak View Post
    The wrong end of the hole is swaged. Perhaps this bolt wasn't sufficiently done so.
    ....or neither end was swaged, somehow the bolt got by that step. I have encountered this but only once.
    My brother saw Deliverance and bought a Bow. I saw Deliverance and bought an AR-15.

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