2016, Michigan Sheriff gets out of his car and Sig P320 goes boom. It happens at about the 1:20 mark. His jacket is in the car, as are his keys, there is a a Conservation Officer witness too. The Deputy has one hand on the steering wheel and one on the door before the shot.
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Some new information on what could also be part of the cause:
Apparently if you reassemble after field stripping and put the slide on with the takedown lever not rotated down it puts the sear on a sort of skinny engagement with the striker.
So you reassemble after a cleaning, put the slide on (takedown lever up) and rack the slide….sear is barely holding the striker. The takedown engages the sear because “OMG we can’t have people pull the trigger to field strip that might have a UD” and it pushes the sear when rotated down. So you put your newly cleaned P320 in your holster, and later the slide moves a little, releases the striker and you have a hole in your car seat if lucky or your leg if you’re not.
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