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GRT-4G Trigger Replacement

Discussion in 'Anything Airgun Related' started by DaveJay, May 10, 2014.

  1. DaveJay

    DaveJay Newbie

    Messages:
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    Location:
    Swindon
    Hi All

    I am new to this forum, having recently bought a BSA/Gamo Hornet to dispose of some rats that had recently taken up residence in my garden.

    In terms of value for money, I am delighted with the Hornet, but like many others, wish that the trigger had less travel and fired more predictably, hence I have just purchased a GRT-4G replacement. It installed easily using the YouTube videos for guidance, however when first fired it was a real 'hair trigger', requiring only the slightest pressure to set it off. Backing the adjustment screw out made no difference.

    I read the Troubleshooting advice on the Charlie Da Tuna site, and filed the trigger back at the appropriate point and re-assembled it. Uncocked, it was perfect - a light, first-stage pull before reaching the second stage firing point. Unfortunately, when cocked, the initial travel of the trigger is completely sloppy, no tension on it at all. The travel can be removed via the adjustment screw, but it is then back to 'hair-trigger' state again. I don't fully understand the mechanics of the trigger, but assume that the intermediate lever must raise upwards and lock when the rifle is cocked? In the uncocked state, this lever maintains good tension on the trigger throughout its' movement. The original plastic trigger has a small spring behind it, which tensions the trigger at this point, but it is supposedly not needed (and won't fit) on the GRT-4G conversion.

    Has anyone else experienced this? I suspect that I may have put it back together incorrectly, but can't easily see where I have gone wrong.

    Meanwhile, I improved the situation by re-installing the original plastic trigger and replacing the original adjusting screw with one approximately twice as long. Screwing this in far enough to raise the intermediate lever gives a much more predictable firing point now (after a very long first pull!).

    Any advice on the GRT-4G unit would be gratefully received,

    Cheers

    Dave
     

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