Apex Action Enhancement Kit for FN 509 Classic – Flat Trigger Upgrade
Not Yet Rated | Write the First Review SKU: 222-APE-119-125
UPC: 854263007418
MFG#: 119-125

Apex Action Enhancement Kit for FN 509 – Classic Trigger

Transform Your FN 509 Trigger – Drop-In Precision, Duty-Ready Performance

Take your FN 509 to the next level with the Apex Action Enhancement Kit – Classic Trigger, the original drop-in trigger upgrade that redefined performance for FN shooters. Precision-engineered by Apex Tactical, this kit delivers a crisper, cleaner, and lighter trigger pull—all while preserving the FN 509’s built-in safety mechanisms.

This is not just another trigger job. Designed specifically for FN 509, 509 Tactical, and 509 Compact models, this drop-in kit replaces the factory components with refined internals and a flat-faced Apex Classic Trigger for an immediate improvement in feel and control—no gunsmithing required.

🔧 Why Choose the Apex Classic Trigger Kit for FN 509?

• ✅ Reduced Trigger Pull Weight (~5.5 lbs)
  Achieve a smoother and more predictable break with reduced effort.

• ✅ Minimal Pre-travel, Over-travel & Reset
  Faster follow-up shots and enhanced control for defensive, duty, or competition use.

• ✅ Crisp, Predictable Break
  A clean, defined wall and break point for confidence behind the trigger.

• ✅ Preserves Factory Safeties
  Includes a center-mounted pivoting safety—no compromise on drop safety.

• ✅ True Drop-In Installation
  No fitting, filing, or modifications necessary. Fits all FN 509 variants.

🎯 Apex Classic Trigger Design

The Classic variant features a smooth flat-face trigger with rounded edges on the front corners and clean, uncut visible sides. It offers a clean aesthetic while delivering the tactile advantage of a flat trigger geometry, providing more leverage and control under pressure.

📦 Included in the Kit

• Apex Classic Flat-Faced Trigger
• Apex Trigger Bar
• Apex Sear
• Apex Safety Lever
• Apex Sear Spring
• Apex Slave Pin for simplified installation

⚙️ Compatibility

• FN 509
• FN 509 Tactical
• FN 509 Compact & Compact MRD
• FN 509 Midsize
• FN 509 LS Edge

• Not compatible with the FNS series

🛡️ Backed by Apex Tactical Quality

Made in the USA, machined to tight tolerances, and tested by professionals. When reliability matters, Apex delivers—trusted by law enforcement, military, and civilian defenders alike.