I watched the latest video, which includes information about the Arizona situation. Here's a link:
https://foxbaltimore.com/features/o...eveals-unexpected-gunfire-from-police-weapons
The pistol shown at point 4:11 in the Fox45 video is clearly a Glock, and it looks like it may have a NY trigger installed. That's just a filler shot not really relevant to the rest of the video, but someone involved in creating the video doesn't know much about the guns in question.
I can't imagine WHY anyone would (as is done in the video) fire a weapon, leave the trigger depressed (thereby not allowing it to reset) , and THEN press it against an unyielding surface. And then have it hit by a sharp blow -- again without releasing the trigger.
LATER UPDATE: See reply 19, below. I may have misinterpreted what happened in that video -- at least for the first unintended discharge.
It looks as though the gun was pushed against a hard surface, and the trigger was pulled. Because the gun was out of battery, it could not fire, but the trigger was held to the rear and as the shooter was backing away from the wall, the gun fired.
With Glocks, the striker spring is only partially tensioned until the trigger pull completes the process. I don't know enough about HOW MUCH/HOW FAR the FNS (or FN509) striker spring is tensioned prior to the trigger pull, but I would expect the firing pin (striker) safety to NOT be affected by strikes or drops.
But -- with most guns, the firing pin/striker safety is disabled when the trigger is pulled fully to the rear -- and that's what we see in the videos. (IF the striker spring is nearly/almost fully tensioned, and the trigger is fully to the rear, the striker safety might be disabled. There are several other guns out there that might not do well when put to that same test -- as several have the striker spring almost fully tionsioned by slide movement.
That doesn't explain why it might discharge when it's holstered, one of the claims in the video, as it's hard to holster a weapon while you're holding the trigger to the rear. Releasing the trigger should reactivate the safety mechanism. Then, too, you'd have to have pretty forceful strike to the firearm as it was holstered before the trigger was released. Doesn't make a lot of sense to me.
I wonder if the photos or videos in question were doctored -- as some folks have suggested, elsewhere.