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Thread: Theoben GP .177

  1. #1
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    Theoben GP .177

    Newly acquired Theoben thumbhole Grand Prix Sirroco in.177. Two owners. First Mr G Taylor who was president of a shooting club in central Scotland. Serial number TB4093. Trying to peace together some information for my own file. Does anyone know what date that would correspond to? Any info to share would be appreciated.

    Completely new new to the Theoben Range. Trigger has an almost imperceptible second stage breaking point. Does anyone have annidiota guide to increasing second stage and decreasing first (based on the model of trigger on this particular rifle). Although it arrived in its original box with the original pump there were no instructions!
    https://www.walnut.black

  2. #2
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    Quote Originally Posted by GSMN1 View Post
    Newly acquired Theoben thumbhole Grand Prix Sirroco in.177. Two owners. First Mr G Taylor who was president of a shooting club in central Scotland. Serial number TB4093. Trying to peace together some information for my own file. Does anyone know what date that would correspond to? Any info to share would be appreciated.

    Completely new new to the Theoben Range. Trigger has an almost imperceptible second stage breaking point. Does anyone have annidiota guide to increasing second stage and decreasing first (based on the model of trigger on this particular rifle). Although it arrived in its original box with the original pump there were no instructions!
    is that the one with the outer and inner allen headed adjusters co-encentric ?
    Always looking for any cheap, interesting, knackered "project" guns. Thanks, JB.

  3. #3
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    Jon. Just popping out but quick photo reveals a hex bolt on the upper front section of the trigger. Is that what you’re referring to? https://imgur.com/gallery/B81IS
    https://www.walnut.black

  4. #4
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    If you can access the image on the last post...
    Does anyone have any idea on what bolt does what?
    Would like a rough idea before I start fiddling.
    https://www.walnut.black

  5. #5
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    sorry Geoff, the one I was thinking was the latter trigger on the Evo. I can't remember how my long departed GP trigger adjusted
    Always looking for any cheap, interesting, knackered "project" guns. Thanks, JB.

  6. #6
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    Trigger adjustment

    Had fun with mine too! Eventually found this on bbs and also a tip to only turn ⅛ of a turn at a time. Now very happy.

    Turn screw clockwise for heavier second stage, however if the adjustment has been reset incorrectly this may not be the case, at this point you have to get back to a base setting which does seem to confuse most people.
    It may also need some work other than adjustment as it could be as much as 15 years old.

    Ben

    David

  7. #7
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    Avid was yours the version with the hex bolt on the upper front face of the trigger? Thanks Geoff
    https://www.walnut.black

  8. #8
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    Its around March 1987 I think.

  9. #9
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    Trigger

    Hi Geoff, yes mine has a single Allen screw in the front of the trigger and a push forward to release safety catch inside the trigger guard. Airgun forum confirms landymicks date of 1987. Enjoy! David

  10. #10
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    Right then i will start with clockwise rotation of said hex bolt and will go canny as they say. Mine is the version with the pull down safety in front of the trigger guard. Same as the one on the John Walters Airgun book vol 4. BTW the serial number is hand scratched in, is yours?
    https://www.walnut.black

  11. #11
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    Hi the trigger on your gun is not the Evo trigger, I believe it is based on the Webley omega design. A Google may reveal how to adjust. I had a Countryman with the same trigger and they can be made very nice. Atb Max
    Plinkerer and Tinkerer

  12. #12
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    Hi the trigger on your gun is not the Evo trigger, I believe it is based on the Webley omega design. A Google may reveal how to adjust. I had a Countryman with the same trigger and they can be made very nice. Atb Max
    Plinkerer and Tinkerer

  13. #13
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    Quote Originally Posted by maximus View Post
    Hi the trigger on your gun is not the Evo trigger, I believe it is based on the Webley omega design. A Google may reveal how to adjust. I had a Countryman with the same trigger and they can be made very nice. Atb Max
    agreed, defo not Evo, but the countryman has the safety inside the guard - well mine does. This is the pull down / outside the guard safety. Also the omega trigger is the type fitted to the SLR88 - different again!
    Always looking for any cheap, interesting, knackered "project" guns. Thanks, JB.

  14. #14
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    getting there...

    Quote Originally Posted by maximus View Post
    Hi the trigger on your gun is not the Evo trigger, I believe it is based on the Webley omega design. A Google may reveal how to adjust. I had a Countryman with the same trigger and they can be made very nice. Atb Max
    I love the bit "and they can be made very nice". Thats what its all about. Hope springs eternal... Just tell me how

    So forgive the lucite, but am I looking for a Webley Omega, a Theoben Countryman or an SLR88 trigger adjustment plan?
    https://www.walnut.black

  15. #15
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    Quote Originally Posted by GSMN1 View Post
    So forgive the lucite, but am I looking for a Webley Omega, a Theoben Countryman or an SLR88 trigger adjustment plan?
    nope, yours is none of them...
    Always looking for any cheap, interesting, knackered "project" guns. Thanks, JB.

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