PEORIA, Ariz. – Apex Tactical Specialties, the leading designer and manufacturer of aftermarket upgrades for FN 509 model pistols, is now shipping its newest FN 509 offering, a curved trigger version of its popular Action Enhancement Kit.

The patent-pending design of the Apex Action Enhancement Kit for FN’s striker-fired FN 509 model pistols includes Apex’s Curved Action Enhancement Trigger mounted on an Apex designed proprietary Trigger Bar which is paired with an Apex Sear. When installed the kit reduces trigger pull weight to give you an approximate pull weight in the 5.5 lbs range. Overall trigger travel is optimized to provide a smooth uptake while delivering a crisp trigger break.

Features and Specifications:
– Reduces trigger pull weight to approx. the 5.5 lbs range
– Delivers crisp trigger break
– Overall trigger travel optimized for better performance
– Center mounted pivoting safety maintains factory safety values
– Fits all current models of the FN 509, as well as FNS Compact model pistols
Part #119-126 (Black)
– MSRP: $149.95

Installation follows the same process as that for the other Apex kits for the FN 509. Step-by-step installation videos include:

How To Disassemble The FN 509 Frame
How To Use The FN Disassembly Fixture
How To Install The Apex Action Enhancement Kit for the FN 509
How To Reassemble The Sear Housing Block of the FN 509

Retailers and wholesale distributors that have not yet ordered and wish to stock the new trigger kit can contact Apex at or (623) 322-0200 for pricing and quantity availability.

For more information on parts from Apex Tactical Specialties, visit, like Apex Tactical on Facebook or follow @ApexTactical on Instagram or Twitter. Instructional videos on the installation of Apex parts are available on Apex's YouTube, Full30 and GunStreamer channels.