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Thread: M11/9 Sometimes shoots S/A

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    Registered User CapnMorgan's Avatar
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    M11/9 Sometimes shoots S/A

    My m11 sometimes shoots semi-auto when selector is set to smg. It happened when I let my buddy shoot it a couple weeks ago, but he's a lil guy and not really a gun enthusiast so I figured he somehow caused it. But today it happened to me. Both times it did it were with stock upper.

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    Registered User CapnMorgan's Avatar
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    Also, as soon as it happened I unloaded it and cycled by hand and it worked as it should, put the mag back in and it was fine.

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    Make sure the selector is not rotating on you while shooting.

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    Registered User CapnMorgan's Avatar
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    Quote Originally Posted by cajun 22 View Post
    Make sure the selector is not rotating on you while shooting.
    I did, I rotated it to semi and back when it happened and it felt fine. nothing looks worn. I noticed my m10 has a different spring setup on the trigger/connector. The m10 connector is held firmer on the sear than the m11 is. I'm thinking recoil may be causing it to slip of the sear, I can't really see anything else that would cause this.

  5. #5
    Registered User CapnMorgan's Avatar
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    I think I figured it out. I tweaked the trigger spring a little, it's holding firm like my m10 now. I did remove the fcg recently too, I bet I bent the spring when I reassembled it.

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    Remove the trip and try it. One minute no tool job.
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    Registered User CapnMorgan's Avatar
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    Quote Originally Posted by Vegas SMG View Post
    Remove the trip and try it. One minute no tool job.
    I will try that if it still isn't right. But the disconnect was barely catching the sear, I think bending the spring fixed it. Hopefully I can test it out tomorrow.

  8. #8
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    had the same problem with my M11/9. turned out to be a broken trigger spring.

  9. #9
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    Are your trigger / disconnect original or aftermarket parts ? I know for a fact that a few years ago there were some badly machined disconnects which didn't allow enough travel for it to properly engage the sear. Any vibration would let it slip off the sear. I thought they were only related to the m10 but maybe there were issues with the m11 versions also.

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