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!