Action Enhancement Kit for FN 509

Description

Living in Arizona means your gear faces a real test: fine dust, brutal heat, and the need for reliable performance when it counts. For FN 509 owners, the trigger is the heart of your control. The Action Enhancement Kit from Apex was the first drop-in trigger kit designed specifically for this platform, and it remains the standard for shooters who demand precision in harsh conditions.

This patent-pending kit directly replaces your factory trigger without any fitting. You get a crisp, consistent break that makes a measurable difference in accuracy and speed, whether you are running drills at the range or managing recoil under a hot sun. The design holds up to high round counts and gritty environments.

Key performance benefits for Arizona shooters:

• Reduced trigger pull weight to approximately 5.5 lbs. This gives you a clean, manageable pull that is light enough for precision shots but retains a safe margin for holster work and movement.
• Shortened pre-travel, over-travel, and reset distance. Less wasted motion means faster follow-up shots and better control during strings of fire. The shorter reset is particularly noticeable when shooting suppressed, where gas and heat can disrupt your rhythm.
• Crisp trigger break. No creepy, stacking pull. You get a glass-like snap that helps you call your shots with confidence.
• Maintains factory safety values. The center-mounted pivoting safety keeps all original drop-safety and sear engagement specs intact. This is critical for a carry or duty pistol that sees hard use.
• Direct drop-in installation. No filing, polishing, or fitting. You can install it in minutes with basic tools and get back to shooting.

Two trigger styles to choose from:

• Apex Classic Trigger: Features rounded front corners and flat, clean sides with no face cuts. A proven design that prioritizes consistent finger placement and a smooth press.
• Apex Type 3 Trigger: Adds chamfered front corners and decorative face cuts on the visible sides. The visual distinction is clear, but the core performance matches the Classic trigger exactly. Both deliver the same reliable feel.

Important note on FDE color availability: Due to supply chain issues with anodizing shops, we have discontinued FDE triggers until further notice. We are actively sourcing a new partner to match our exact color requirements. If you previously received an FDE trigger and are unhappy with the shade, please contact our Customer Service team to discuss a free replacement in red or black. We apologize for the inconvenience.

Specs & fitment