Sig Sauer P320 Trigger Spring Kit – Step-by-Step Install & Flat Trigger Overview

In this video, we walk you through the complete installation of the M*CARBO Trigger Spring Kit for the Sig Sauer P320 and take a look at how it pairs with the M*CARBO Short Stroke Flat Trigger. This step-by-step guide is designed to help responsible P320 owners better understand how the trigger components work together, how the spring kit can affect trigger pull, and what to check for proper function. We start by showing stock trigger pull measurements, then replace the striker spring and sear springs before comparing the modified trigger pull with both the factory trigger and the M*CARBO flat trigger. We also touch on considerations for P320 models equipped with a manual safety. Please refer to the timecodes below for specific chapters. TIMECODES: Intro - 00:00 Tools Needed - 00:11 Stock Trigger Pulls - 00:25 Replacing Striker Spring - 01:15 Replacing Sear Springs - 03:06 Modified Trigger Pull - 13:33 Mod Pull with Flat Trigger - 14:17 P320 Manual Safety - 15:00 The Trigger Spring Kit is intended to reduce trigger pull weight and provide a smoother, more consistent trigger press when used correctly, while maintaining safe, semi-automatic operation of the firearm. Actual trigger pull reduction and overall feel will vary between individual pistols and setups. Any polishing or fitting you perform should only be done on appropriate contact surfaces and must not remove or defeat safety features. Safety & Responsibility: Always verify that your Sig Sauer P320 is completely unloaded before beginning any work. Remove the magazine, lock the slide open, and visually and physically inspect the chamber to confirm it is clear. Follow all standard firearm safety rules and work in a safe, organized environment. After any trigger or spring changes, perform thorough function checks and test the pistol at the range with appropriate ammunition to confirm reliable operation. If you are unsure about any part of the installation process or do not feel fully confident performing it yourself, consult a qualified gunsmith. This video is intended for educational and informational purposes only and for use by responsible, legally authorized firearm owners in accordance with all applicable local, state, and federal laws. #sigp320 #p320 #sigsauer