Inside the P320 Part 2

Published on August 29, 2025
Duration: 7:28

This video provides a beginner-friendly guide on how to safely check the functionality of a SIG SAUER P320 pistol at home. It details a partial disassembly process to inspect the striker, striker safety lock, and sear reset mechanism. The guide also covers testing the trigger bar, captive safety lever, and manual safety (if equipped), ensuring all components operate as designed for safe and reliable function.

Quick Summary

To safely check your SIG P320's functionality, ensure it's unloaded, then field strip the slide. Test the striker and striker safety lock by deactivating the lock and pushing the striker forward; it should protrude. Release it to ensure it retracts. Reassemble and check sear reset and trigger mechanism function.

Chapters

  1. 00:00Introduction & Viewer Question
  2. 00:48Step 1: Unloading the P320
  3. 01:32Step 2: Slide Disassembly
  4. 01:47Step 3: Barrel & Guide Rod Removal
  5. 01:57Step 4: Striker & Safety Lock Check
  6. 02:44Step 5: Testing Striker Protrusion
  7. 03:13Step 6: Striker Safety Lock Reset
  8. 03:45Step 7: Lower Half Function Check
  9. 03:55Step 8: Sear Reset Procedure
  10. 04:37Step 9: Trigger Pull & Captive Safety Lever Test
  11. 05:18Step 10: Mechanical Disconnector Test
  12. 05:50Step 11: Manual Safety Function Test
  13. 06:16Step 12: Reassembly Process
  14. 07:02Conclusion & Safety Reminder

Frequently Asked Questions

How do I safely check if my SIG P320 is functioning correctly at home?

To safely check your SIG P320, first ensure it's completely unloaded. Then, field strip the slide to inspect the striker and striker safety lock. You'll test if the striker protrudes when the safety lock is deactivated and if it retracts when released. Reassemble and check the sear reset and trigger mechanism function.

What are the key components to check during a P320 function test?

Key components include the striker, striker safety lock, sear, captive safety lever, and the mechanical disconnector. You'll verify the striker doesn't protrude without deactivation, that the sear resets properly, and that the trigger mechanism actuates the captive safety lever and disengages the sear correctly.

Can I disassemble my P320 for a function check without pulling the trigger?

Yes, the SIG SAUER P320 can be partially disassembled for function checks without pulling the trigger. This is a key safety feature. The slide can be removed, and internal components like the striker and safety lock can be tested by manipulating them directly.

What does it mean if the sear doesn't move when I hold down the disconnector and pull the trigger on my P320?

If the sear remains motionless when you hold down the mechanical disconnector and pull the trigger, it indicates the trigger bar is correctly disconnected from the sear. This demonstrates the disconnector is functioning as intended to prevent accidental firing.

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