It's highly recommended to watch the M*CARBO Installation Instructions Videos once before you start the installation, and then watch it again as you're following along doing the installation.

    Click here for the M*CARBO Installation Video Directory


    Reduce your trigger pull from 7.25lbs to a modified 4.25lbs

    Improve accuracy and overall FN 509 Performance

    Solid 40% Trigger Pull Reduction!

    Custom FN 509 Aftermarket Trigger Upgrade!

    Highest Quality American Spring Steel ASTM A228 Music Wire

    FN 509 Trigger Kit includes a Custom Lighter Sear Spring, Disconnector Spring, Striker Spring and Striker Block Spring

    Protected by the M*CARBO 100% Lifetime Guarantee

    Made in the USA!

    M*Carbo, FN 509 Trigger Spring Kit, Fits FN 509

    • Brand: M*CARBO
    • Product Code: MCC-22229222211111
    • Availability: In Stock
    • $34.99 USD