Action Enhancement Kit for FNS

This drop-in trigger kit directly addresses the excessive pre-travel, long reset, and heavy pull weight common to factory FNS triggers. By replacing the OEM trigger bar, sear, and associated springs with a patent-pending, center-mounted pivoting safety design, the system reduces pull weight to approximately 5.5 lbs. while sharpening the break and shortening the reset distance. The kit retains all factory safety values and requires no fitting.

Platform Compatibility

• FN FNS-9
• FN FNS-9L
• FN FNS-40
• FN FNS-40L

Key Features

• Pull weight: Approximately 5.5 lbs. (verified with a Lyman digital trigger pull gauge)
• Reset reduction: Measurable decrease in reset distance versus OEM; tactile and audible reset feedback retained
• Pre-travel / over-travel: Reduced via optimized sear geometry and trigger bar profile
• Break quality: Crisp, with minimal creep—consistent with USPSA Production division requirements
• Safety: Center-mounted pivoting safety maintains drop-safe performance; no modification to striker block or firing pin safety
• Installation: Drop-in replacement; no filing, stoning, or permanent modifications required

Installation Difficulty: 2/5

Requires basic armorer tools: roll pin punches (1/16″ and 3/32″), brass hammer, and non-marring nylon punch. Detailed instructions included. Estimated time: 20–30 minutes for first-time install. No trigger gauge required for function check, but recommended for pull weight verification.

FAQ

Will this work with my FNS-9C or FNS-40C?

No. This kit is designed specifically for full-size FNS-9, FNS-9L, FNS-40, and FNS-40L frames. Compact models (C suffix) use a different trigger housing geometry and are not compatible.

Does this trigger reduce pull weight below 5.5 lbs. over time?

The 5.5 lb. figure is a break-in value after 200–300 cycles. Some end users report settling at 5.2–5.4 lbs. after extended use. The kit does not drop below 4.5 lbs. under normal conditions, maintaining USPSA Production legality.

Can I use this trigger for carry?

Yes. The center-mounted pivoting safety retains factory drop safety. However, the reduced pre-travel and lighter pull may require additional training for defensive use. Confirm with your local range or agency policy if used on duty.

Shipping: Ships same business day if ordered by 2:00 PM EST. Warranty: Lifetime replacement against manufacturing defects. No gunsmithing required for return to factory configuration.