You need the JP 3.5T springs. The T is the heavier hammer spring for reliable ignition on harder primers. Grind down top rear of trigger that engages safety. Grind about .040-.050” off. Install set screw through pistol grip bolt hole to take up creep. Takes about an hour total and $12. If you have experience stoning trigger surfaces you can also stone with a white India stone and really make it nice. I do this on my utility carbines/pistols. Target guns get Jard fully adjustable.
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