Armory Craft Sig Sauer P320 Action/Trigger Pull Reduction Spring Tuning Kit works for all 320 Series Pistols, including M17/18, AXG, X5, Legion X5, etc. The desired trigger pull weight can be achieved by installing anywhere from 1 to up to 5 springs. Depending on how many of the tuning springs are installed, the final trigger pull weight will be reduced by anywhere from 0.5 to 2lbs. The final pull weight will vary from one firearm to another and will depend on:

• Which of the tuning springs are installed
• How many tuning springs are installed (1 to 5)
• The starting trigger pull weight before this kit is used
• Other modifications already done to the pistol
• Which type of the trigger is in the pistol

Included:

•  Reduced Power (-25%) Sear Spring Set (2 springs)
•  Reduced Power (-50%) Sear Spring Set (2 springs)
•  Reduced Power Trigger Return Spring (-10%) x 1
•  Reduced Power Trigger Return Spring (-20%) x 1
•  Reduced Power Striker Safety Spring (-20%) x 1

All triggers, hammers, springs or any other ignition gun parts are intended for installation only by a gunsmith or a qualified armorer.