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Thread: Needing helpwith Sten MKV Semiauto build

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  1. #11
    Advisory Panel tiriaq's Avatar
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    I suppose they could be used to check feed, ignition and extraction/ejection when hand cycled.

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  3. #12
    Legacy Member tj214's Avatar
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    Are you having specific problems? If so, what are they? Please give precise details.

    A number of specific and generic problems have been noted over time with the semi builds, including the IO parts. The IO parts are fine and will work well, but...

    Building a semi Sten is like what we used to call on active duty a "magical operation." First you do A, then you do B, then a miracle is required to get the intended result.

    I'm being only partly facetious; we've found several things that need to be done carefully during the build that are not widely discussed to avoid (or mitigate) feed, cycling, and firing problems. If we know precisely what problems you're having it will help the experts here step you through the solution(s).

    Tiriaq gave you solid advice. Also check Peter Laider's many comments on Stens. He's provided a lot of detail about issues with the original FA guns that can show up in the semi builds as well.

    Good luck!

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    Legacy Member Archilochus's Avatar
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    As others mentioned, further info is needed on what problem(s) you might be having with the gun. Also, you should have several mags on hand for testing, to try and eliminate the bad ones.

    And ... pictures! Always like to see some build pics.

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    Contributing Member mrclark303's Avatar
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    Back in the good old days when we in the UKicon where trusted with such things, we could get Stens converted to semi automatic by simply welding the selector in the semi position.

    I can see that these rather complex US semi builds are better than not having a Sten, but, it does seem these builds actually have little in common with the simple, solid machined breech block blowback brilliance, of the original cheap, selective fire Sten.

  7. #15
    Advisory Panel tiriaq's Avatar
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    Mechanically, these semi auto Stens are very much like the Cooey Model 64 .22.

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    Legacy Member Houligan's Avatar
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    I have purchased three sets of springs so far. Problem I'm having now is that its not coming back to catch the sear to cock it. Everything was so easy until these dang springs...

    ---------- Post added at 02:21 PM ---------- Previous post was at 02:17 PM ----------

    To clarify, its loading, firing and ejecting just not cocking back. When I get the striker spring short enough to cock back then it wont fire...

  9. #17
    Legacy Member Houligan's Avatar
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    I would post pics if I could figure out how, it wants a url?

  10. #18
    Legacy Member Houligan's Avatar
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  11. #19
    Advisory Panel browningautorifle's Avatar
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    You may need a host like Google pics? I can post them if you send them to me...check your PMs for email.
    Regards, Jim

  12. #20
    Advisory Panel browningautorifle's Avatar
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    Here's the pic OP was trying to post... Not sure it will provide the clarity these guys need though.
    Attached Thumbnails Click image for larger version

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    Regards, Jim

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