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Thread: M11/9 SMG ejection port “bowing”

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    M11/9 SMG ejection port “bowing”

    After several thousand rounds of shooting, about 1990, I stashed this gun away in my safe, where it sat untouched for 30 years. I recently dug it out with the intention of selling it and noticed that the forward portion of the ejection port of this SWD M11/9 SMG is bowing out slightly. I have an NIB one also, and on that unfired gun, that area is perfectly flat. Is this a common issue in these? Does it affect reliability in anyway? I don’t recall any malfunctions at all after shooting it, and before I put it away 30 years ago. I tried to attach a picture here, but for some reason it won’t let me. Appreciate any comments on this issue.

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    BTW, I tried to follow the directions for attaching pics, but got the following error message:

    The following errors occurred:

    SWD_M11_9_Pic.JPG: The Dimension limits for this filetype are 800 x 0. We were unable to resize your file so you will need to do so manually and upload it again. Your file is currently 2592 x 1936.


    The error message says the dimension limits for this file type are 800 x 0. 800 x zero? I think any picture would exceed zero as one of the dimensions. Can anyone explain this to a gray haired Old Dinosaur who is Tech Challenged?

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    Registered User KickStand's Avatar
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    Registered User theduke's Avatar
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    Uppers are cheap.....The Bow is odd unless there was a "incident" somewhere down the line.

    If lower is fine your all good.

  5. #5
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    Vegas SMG's Avatar
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    I’ve seen this before.
    Possibly from a round not being fully chambered before ignition.
    Lay a piece of wood along the length of the side and hit it once or twice with a hammer. Good to go..
    Please visit my FB page for the latest CF-W bolt information.
    https://www.facebook.com/VegasSMG/?ref

  6. #6
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    Commonly caused by a bad extractor. The shell does not clear the ejection port and gets caught by the bolt going forward. Gets crushed between the bolt and front of the ejection port. Empty shell can get get kicked out during the process, so you may not know it is happening. I have shot high speed video and seen shells spinning in place and not being kicked out the ejection port but being pushed out of the way by the returning bolt, or of course causing a stove pipe jam.

    To test, place a fired shell in the chamber and let the bolt slam closed on it. Slowly pull the bolt back and see if the shell is released before it contacts the ejector rod. It can also be caused by extractor not consistently grabbing around the rim of the shell and actually only grabbing on the side.

    Replace your extractor and bend the ejection port flat again.
    Richard Lage
    Lage Manufacturing, L.L.C.
    www.max-11.com

  7. #7
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    ^ I would add that in my case I used the same extractor but put a stronger extractor spring and that was the final piece of the puzzle.

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    SWD M11/9 SMG Extractor and spring?

    Quote Originally Posted by Hey... View Post
    ^ I would add that in my case I used the same extractor but put a stronger extractor spring and that was the final piece of the puzzle.
    First of all, thanks to everyone for all the great info, seems like a relatively simple fix for this issue.

    What are the good sources for MAC parts in general, and SWD M11/9 parts (like a new extractor and stronger spring) in particular?

  9. #9
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    Offmarksman's Avatar
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    Ftf industries is usually my go-to for oem style parts. Lage has some great upgraded parts.

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