shotgunone Posted September 9, 2015 Share Posted September 9, 2015 Anybody know what the mainspring / hammer spring weight is in a factory Trubor 9mm? STI 's website says that the recoil spring in there compensated guns is 8 lbs. but it sure feels like it's heavier than that anybody know for sure? I don't have a spring tester I was thinking about just ordering some new springs. Any recommendations for main spring and recoil spring for Major and minor loads? Thanks Link to comment Share on other sites More sharing options...
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