Inside the P320

Published on August 20, 2025
Duration: 8:32

This video provides an in-depth look at the SIG SAUER P320's internal mechanisms and safety features, presented by Phil Strader, VP of Consumer Affairs. It details the five sequential mechanical actions required to discharge the firearm and highlights the redundant safety systems, including the captive safety lever, striker safety lock, and disconnector. The manufacturing process at SIG SAUER's Newington, NH facility is also showcased, emphasizing high-tech robotics and quality control.

Quick Summary

The SIG SAUER P320 requires five sequential mechanical actions to fire: trigger pull, captive safety lever rotation, striker safety lock disengagement, sear rotation, and striker release. It also features redundant safety mechanisms like a secondary sear notch and a striker safety lock for enhanced safety.

Chapters

  1. 00:00Introduction & Manufacturing
  2. 00:34Safe Disassembly Features
  3. 01:46The Five Steps to Discharge
  4. 03:20Step 1: Trigger and Trigger Bar
  5. 04:04Step 2: Captive Safety Lever
  6. 04:31Step 3: Striker Safety Lock
  7. 05:16Step 4: Sear Rotation
  8. 05:45Step 5: Striker Release
  9. 06:14Redundant Safety Mechanisms
  10. 07:41Disconnector Safety

Frequently Asked Questions

How does the SIG SAUER P320 ensure safe disassembly?

The P320 is designed for safe disassembly by requiring the magazine to be removed and the slide locked to the rear. Crucially, it does not require a trigger pull for this process, enhancing user safety during maintenance.

What are the five sequential mechanical actions for the P320 to fire?

The P320 requires five independent mechanical actions in sequence: trigger pull, captive safety lever rotation, striker safety lock disengagement, sear rotation, and finally, striker release to fire a round.

What redundant safety features does the SIG SAUER P320 have?

The P320 includes a secondary sear notch to catch the striker during a drop, and the striker safety lock provides a third level of redundant safety if both sear notches fail.

How does the P320 prevent firing when the slide is out of battery?

A mechanical disconnector prevents the P320 from firing when the slide is out of battery. It achieves this by pushing the trigger bar down, disengaging it from the sear mechanism.

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