M*CARBO Brotherhood

FN 509 upgrades

Thanks for the warm welcome from all.

Question:
Soon, I’ll be installing a flat Apex trigger kit and also the MCARBO trigger spring kit. Would y’all recommend replacing all included parts from the Apex trigger kit (like the new Apex sear) along with the items included in the MCARBO spring kit? All for my FN 509 standard.

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