FEATURES:

Includes forward set sear, trigger, striker block kit, and spring kit
Striker block kit includes striker block, spring, and talon tactical tool
Spring kit includes 4 and 5.5lb  trigger return springs, trigger return spring install tool, sear spring, and ram spring
Results in trigger pull weight near 4lbs for competition or 5.5 for duty/carry
Smooth uptake and reset
Total trigger travel of .120"
Improved safety features make the FSS a reliably safe trigger system
Works with all Smith & Wesson M&P pistols in all centerfire calibers and configurations except M&P Shield
Requires the use of the sear housing block designed for the large size sear plunger and spring (current production as of June, 2011)