Reduce your trigger pull from 7.25lbs to a modified 4.25lbs (Average results can vary up to +/- 1lb)
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
5.0/5.0 (Based on 1 Review)
Tyler J 659 days ago
m-carbo never disappoints installed this 509 kit in my post 2014 fns9. What a huge improvement. I now have a 4.5lb smooth ass trigger. took the grit and creep right out. very nice reset as well. highly recommended for the fns.