If you pull the trigger far enough to disengage the drop safety and firing pin safety block, then it is entirely possible to discharge the weapon by applying force to the slide, shaking the weapon, or the like. Pulling the trigger disables the internal safeties that would prevent this.

This is not unique to the P320, Sig, or even striker-fired handguns in general. This could just as easily apply to a CZ-75B. There is no magic that keeps the striker from dropping until the shooter has their heart set on discharging a round.

There is a reason that rule #3 of firearm safety is to not put your finger on the trigger until you're ready to shoot

I think you are being insufficiently charitable / analytical in the face of the demonstration by Wyoming Gun Project. I'm sure everyone agrees with your basic assessment that _any_ input on the trigger is a violation of one of the most fundamental rules of gun safety.

But there's nuance here.

They showed that with <=1mm of trigger pull (far less than the distance of the firing sequence), the weapon can be put into a state where miniscule input on the slide (consistent with typical holster carry) causes a discharge.

I'm not a firearms expert, but I very much doubt that any hammer-fired (and indeed, even the vast majority of striker-fired) weapons can be put into such a state.

Are you aware of any demonstration that shows another modern handgun being put into a state where this same amount of input on the slide can cause an actual discharge, let alone with <=1mm input on the trigger?

> Are you aware of any demonstration that shows another modern handgun being put into a state where this same amount of input on the slide can cause an actual discharge

Yes actually. see the video I linked above: https://youtu.be/r1KoSBcn2bY?feature=shared

Jeez, that's a great video. Thank you. I stand corrected. I wish he measured the movement on the trigger though; it looked like much more than 1mm.

I wonder: do you know if there's a hammer-fired pistol which can be put into a similar state?