FN 509 // SECRET FIX for Your Gritty Trigger
This guide details a specific gunsmithing fix for a gritty trigger in the FN 509 pistol. The expert-level instruction from Tactical Toolbox focuses on identifying and smoothing the barrel's front lug, a common source of friction. The procedure involves light filing and sanding, followed by lubrication, to significantly improve trigger feel on both stock and aftermarket triggers.











