Action Enhancement Kit for FN 509

Description

The Action Enhancement Kit from Apex is the original drop-in trigger upgrade designed specifically for the FN 509, and it has become a standard upgrade for owners who shoot regularly, carry concealed, or hunt with this platform. This kit directly improves how your trigger feels and performs, giving you a cleaner, more predictable pull without any guesswork or gunsmithing.

What this kit does for your FN 509:

• Reduces pull weight to approximately 5.5 lbs. This lighter, more manageable pull makes it easier to shoot accurately during long range sessions or under the stress of a defensive situation.
• Shortens pre-travel, over-travel, and reset distance. Less wasted motion in the trigger stroke means faster follow-up shots and a more direct connection between your finger and the shot breaking.
• Delivers a crisp, clean break. No more gritty or mushy feel — you get a distinct wall and a clean snap, which builds confidence in your shot placement.
• Maintains factory safety values. The center-mounted pivoting safety keeps all original drop-safe performance intact, so you don’t have to sacrifice reliability for a better feel.

Drop-in installation — no fitting required. This kit is a direct replacement for your factory trigger assembly. You can install it at home with basic tools and a little patience, and it will work with your existing frame and slide without any modifications.

Two trigger styles to choose from:

• Apex Classic Trigger: Features a radius on the front corners and a flat face on the visible sides with no cuts. This is a straightforward, clean look that suits most shooters who want a simple, functional upgrade.
• Apex Type 3 Trigger: Adds chamfers at the front corners and decorative face cuts on the visible sides for a more distinct appearance. The performance is identical to the Classic — the difference is purely cosmetic.

Important note on FDE color availability: Due to ongoing supply chain issues, we have temporarily discontinued FDE triggers. We are actively working with a new anodizing shop to match our color requirements. If you previously received an FDE trigger and are unsatisfied with the color, please contact our Customer Service team to discuss replacing it with a red or black trigger. We apologize for the inconvenience.

Specs and fitment: This kit fits all FN 509 models (standard, compact, and midsize). Pull weight after installation is approximately 5.5 lbs. Trigger travel reduction varies slightly by model but is consistent across the platform. The kit includes the trigger, se