Steyr Transfer port

Discussion in 'Steyr' started by holly, Sep 15, 2019.

  1. holly

    holly Well-Known Member

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    Lad has Bought a steyr down the club . but it has a green transfer port . he has no dosh left . so he wants to drill it out . how far can he drill it . what drill size ? cheers HOLLY

    PS Unless anybody has one a bit cheapish . Ta .
     
  2. holly

    holly Well-Known Member

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    Should have said , unless anybody has a Black transfer port ?
     
  3. Simonix

    Simonix Member

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    I believe that the black port is 4mm. So therefore, drill to that size.

    I’m sure someon will come on here soon and confirm/deny.

    ChrisC?
     
  4. holly

    holly Well-Known Member

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    Can you do that and the O ring still fit i wonder ? ??? HOLLY

    Ps anybody know how you change the pin in the block over to change from left hand to right ?
     
  5. Simonix

    Simonix Member

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    For the sake of £27 (price on intershoot website), I’d rather just get the proper black one to be honest.
     
    cloverleaf likes this.
  6. dlloyduk

    dlloyduk Over Gunned Amateur.

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    You can drill out the transfer port to 4mm.
    I have a green one drilled to 4mm no problem.
    On swapping from right to left I'm not 100% sure. I seem to remember one part needs changing. I believe there's a video on the Steyr site. I'll post it up if I can find it.
     
  7. holly

    holly Well-Known Member

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    There is a hole for the pin on the other side of the block but no pin in it . so i would think you just change em over . but don't want to muller it ??? HOLLY
     
  8. dlloyduk

    dlloyduk Over Gunned Amateur.

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  9. holly

    holly Well-Known Member

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    As far as i can see Chris says that it is tricky to change em over . so better tap it in and get a new one ? HOLLY
     
  10. scruff

    scruff Active Member

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    I am left handed....leave it like it is and learn to load with your right hand....not as hard as it seams.
     
  11. hmangphilly

    hmangphilly Can't Re Member

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    They are in tight Holly .
    Ask Barry
     
  12. hmangphilly

    hmangphilly Can't Re Member

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    drill out 4mm no problem

    only need to change the plastic handle on cocking lever . you can leave it but it will be up side down
     
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  13. AlexS

    AlexS Active Member

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    There is still the dry fire mechanism on the right side, that is tricky to change to the other side. But you can remove it altogether.
     
  14. holly

    holly Well-Known Member

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    Sounds to me like it is best to just leave as is untill he can get another pin . Cheers All ??? HOLLY
     
  15. astra

    astra Member

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    Is there any benefit drilling the transfer port on Challenge? I feel as a drawback that the short 45cm barrel is giving me no more than 110 shots. Moreover the knock and the sound is some kind harsh. If drilling the port can overcome this?...
     
  16. dlloyduk

    dlloyduk Over Gunned Amateur.

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    Yes shot count will go up and you will need to reduce hammer spring tension. So will reduce the hammer noise.
    Muzzle blast is still very loud.
     
  17. astra

    astra Member

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    Shots or velocity?
     
  18. Simonix

    Simonix Member

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    A larger transfer port (Or drilling if that's what you want to do), will increase the power if everything else is left the same. So you have to reduce the hammer spring tension to get it back under 12ft/lbs.

    This in turn ,will then use less air for the shot, and therefore increase your shot count.
     
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  19. astra

    astra Member

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    The hex opening for the allen key, therefore should be left intact, OK?
    As the transfer port is made of plastics, I'm wondering how deeply will I have to drill and where exactly to stop not to drill the hex profile. Any recommendations in this regard, please?
     
  20. suds

    suds Senior member

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    Remove the transfer port to drill it, you are only making it slightly larger.
     

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