...There’s a military case, on video and has witnesses. Marine had a P320 in a holster with the safety on and it went off...
I researched this issue — P320 accidental discharges, use of a manual safety — pretty carefully before buying a P320 a couple of months ago.
Could you post a link to the video of the incident above?
Here is a longish video on the manual safety design and test of the manual safety. In it, the gun is placed in a machine, manual safety engaged, and trigger is pulled. With safety engaged, a complete trigger pull occurs at 20 lbs. The striker, however, is not released, and the trigger is returned to functionality.
The test continues to about 100 lbs. The trigger bar breaks at that point, rendering the trigger non functional, but the striker is still not released.
The manual safety, it seems to me, is extremely robust.
You can start at about nine minutes in if you don't want to watch the whole video.
https://youtu.be/anZg4b-QLRA?si=tsCmWRgCtOkHn-mT
I am agnostic on whether or not the P320 without a manual safety is sufficiently safe, but I am convinced that with a manual safety engaged it will not discharge.
I like manual safeties.