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    gamo g-magnum 1250 IGT MACH 1 transfer port size

    Hi, I do have the original G-Magnum Mach 1 1250 IGT air rifle that i did order from Spain during Covid (ordered from Belgium), it is limited to 24J (it is written on the barrel). The original port size is less than 2mm because a drill bit of 2mm can't get in. I did drill the hole to 3,5 mm...