top of page

Apex originated the drop-in trigger kit for the FN 509. The patent-pending design of the Action Enhancement Trigger Kit for the FN 509 (with Flat-Faced Trigger) makes a huge difference in the trigger pull characteristics and immediately became a must-have for 509 owners. When installed, this kit will:


– Reduce trigger pull weight to approx. 5.5 lbs.

– Reduce trigger pre-travel, over-travel and reset distance

– Deliver a crisp trigger break

– Maintain factory safety values with a center mounted pivoting safety

– Direct drop-in replacement, no fitting required


Notice from APEX regarding color trigger variations:

Due to the nature of the anodize process and materials our triggers are manufactured from; our Flat Dark Earth (FDE) triggers are coming out as more of a burnt bronze color.  This color is a repeatable color, unlike the previous vendors who have attempted similar colors for us in the past.

If you receive an FDE trigger and are unhappy with the color, we urge you to contact Apex Customer Service staff to discuss replacing your trigger with one in Red or Black.


For Use In These Guns:

For use in all current FN 509 model pistols, including (but not limited to) the Tactical, Midsize, Compact, and Edge Series models.

Also fits the FNS Compact (FNS-C) models.


Does Not Fit These Guns:

Not for use in FNS full size or Longslide models

Not for use in the FN 503

What's Included

1 ea. Action Enhancement Trigger w/ Apex Trigger Bar for FN 509

1 ea. Apex Performance Sear


FN 509 Action Enhancement Kit

PriceFrom $160.00
Excluding Sales Tax
    bottom of page