Apex Tactical Action Enhancement Kit for FN 509

Apex Tactical Action Enhancement Kit for FN 509

The Apex Action Enhancement Kit transforms the trigger performance of your FN 509 pistol with a thoughtfully engineered drop-in replacement system.

What You Get

This kit replaces three critical components:

• Factory polymer trigger
• Trigger bar
• Sear

Performance Improvements

Apex's patent-pending design delivers measurable upgrades across multiple dimensions:

Trigger Pull Weight Reduces pull weight to approximately 5.5 lbs—a meaningful improvement over factory specifications that enhances control and consistency.

Trigger Travel Refinements The kit systematically reduces:

• Pre-travel (slack before engagement)
• Over-travel (movement after break)
• Overall trigger travel distance
• Trigger reset distance

Shooting Experience You'll notice a smooth, predictable uptake followed by a crisp, clean trigger break. This combination helps you shoot more accurately by reducing the surprise factor at the moment of firing.

Installation

Designed as a true drop-in replacement—no gunsmithing required. Installation takes minutes with basic tools.

The Result

Whether you're training, competing, or carrying for personal protection, this upgrade gives your FN 509 a trigger that rewards good technique and supports consistent shot placement.