FNP, FNX all calibers, DA pull reduced about 1.5# from stock, single action pull weight reduced to around 3.5lbs with a super crisp break after the trigger slack takeup. Price runs $79, only the lower frame is needed.

Trigger reset reduction, adjustable trigger set screw installed, this eliminates over trigger over travel and cuts the trigger reset up to 40%, add $49.

Accuracy upgrade available for $39, this can reduce group size up to 20%. The pistol less the magazine is needed.

FN57 reduce the pull weight by 2lbs from stock, creep is eliminated after the trigger slack take up, the lower frame and magazine is needed, $69.