I figured out a long time ago that messing with a fire control group. with limited knowledge ant tools isn't smart
even a gunsmith will be very reluctant to take metal away from the engagement surfaces they may give a very light polish to remove burrs but for the most part they do not remove any metal. innless absolutely required and if so, it will be done extremely carefully and accurately. one thou or 0.25mm can make a massive difference like the difference between a safe trigger and and unsafe trigger.
gunsmith trigger jobs normally consist of adjusting spring tensions. this is reversable if you get it wrong. unlike removing metal
take your rifle to a gunsmith!
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