Apex Tactical Specialties J-Frame Duty Carry Spring Kit Silver. Installation of this kit reduces the trigger pull weight of your center fire J-Frame Smith & Wesson Revolver by approximately 3.0 lbs. from factory specifications. Expected Results Reduces trigger pull weight by approximately 3.0 lbs. from factory specifications Applicable To What Gun(s) Works with all modern centerfire J-Frame revolvers with the frame mounted firing pin. Does NOT function in the polymer Bodyguard .38 Revolver. Included Accessories: 1 ea. Apex Rebound slide spring 1 ea. Apex Main Spring 1 ea. Apex XP Firing Pin 1 ea. Reduced power firing pin return spring (light) Specifications for Apex Tactical Specialties J-Frame Duty Carry Spring Kit: Manufacturer: Apex Tactical Specialties Color: Silver Gun Make: Smith & Wesson Package Contents: Apex Tactical Specialties J-Frame Duty Carry Spring Kit Apex Tactical Specialties 103-106: J-Frame Duty Carry Spring Kit Silver