How to fix a P320 that fails the Sear Movement Test

The Sear Movement Test examines whether the sear of a P320 moving defeats the final safety feature of the P320, the Striker Safety Lock, or not. This video begins with a recap of previous findings, identifies the specific design flaw that appears to be the root cause of a failure of the Sear Movement Test, and both explains and demonstrates an at-your-own-risk modification that can be performed to a post-"upgrade" sear to fix this specific design flaw. How to perform the Sear Movement Test - if the striker protrudes from the breechface, your P320 fails this test:    • P320 Test Instructions: Protruding Striker...   SIG MECHANICS video demonstrating how to disassemble and reassemble your FCU:    • P320 FCU - A TEXTBOOK TEARDOWN   0:00 - Introduction / If your P320 fails the tests 0:50 - Summary of what we know 2:52 - Failure modes of the Striker Safety Lock - the final safety mechanism 4:38 - Normal vs. abnormal firing sequence 7:15 - Two mitigating factors can prevent an uncommanded discharge 9:44 - The design flaw (and why the P365 is safe) 11:35 - The purpose of the rear leg...? 13:17 - "So we chopped it off" 13:59 - Sear Movement Test with the modified sear 14:55 - No apparent change in normal pistol functions 15:48 - Cautions, disclaimers, and conclusions