P320 trigger

[Scotty]

Sig's voluntary upgrade was in response to the videos where it was dropped or hit with a hammer at a certain angle. That angle is not one that is tested per industry/military requirements.

The trigger safety is one method of stopping the inertia of the trigger from causing the gun to fire. Reducing the mass of the trigger simply increases the acceleration required. It CAN still go off, but you have to drop it higher. Reducing mass is used in series 70 1911's because there is no firing pin block. An impact to the muzzle can cause the firing pin to set off the primer. Springfield used a titanium firing pin to pass the drop test.

Thumb safeties are not a factor in the drop test as you have to drop it with the safety in the off position.

While Glocks have a partially cocked striker, most striker fire guns don't. Springfield XD and S&W M&P have a fully cocked striker. M&P have a little bump on the sear to move it slightly more, but people usually filed away the bump, aftermarket ones also removed the bump to get a better trigger pull feel, so essential it is fully cocked.

The voluntary upgrade did change the sear design. Instead of the striker just resting on the sear, the sear is now spring loaded so it makes full contact on the striker. The angle was also changed to more of a hook which is why people notice the slide moves down a lot when you pull the trigger without a mag in the gun. The angle basically pulls the sear and striker together to prevent it from slipping off. There's also a half cock notch in case the striker comes off the sear. Other striker fire guns don't have half cocks.

Multiple internal mechanical failures need to all happen in order to make the gun go off. Which makes me skeptical to these claims. Basically the trigger HAS to move to make the gun go off. Which leads to the question about the holster or if something else touched the trigger?

[BajaJames83]

The recall from Sig was just a giant coincidence then.

wasnt a recall it was a voluntary upgrade.....

They had to be dropped from a certain height at a certain angle or hit with a hammer.
They are not the first with triggers too light (Remington 700.... )
That was 100% on Sig there as they were trying to make a light/ smooth striker trigger.
The post upgrade guns do not have this problem.

[flhxxx]

I have the gray guns straight trigger, properly adjusted. It's a huge improvement over stock feel, way better than any of the triggers on my Glocks, even the ones with aftermarket enhancements. I will probably switch to their full kit at some point.

https://grayguns.com/product/p320-adjustable-straight-trigger-system-competition/

[Dr. Peter Venkman]

Multiple internal mechanical failures need to all happen in order to make the gun go off. Which makes me skeptical to these claims. Basically the trigger HAS to move to make the gun go off. Which leads to the question about the holster or if something else touched the trigger?

It's an inertia issue which is why they are capable of going off while holstered or being bumped. The trigger is capable of movement when the gun is holstered.

[Scotty]

It's an inertia issue which is why they are capable of going off while holstered or being bumped. The trigger is capable of movement when the gun is holstered.

I don't disagree inertia can move the trigger. The industry drop test requirements is 4 ft onto a 85 durometer rubber pad. Sig's demonstration was done onto the concrete. Let's say it fails at exactly 4 feet. The change in mass basically raises the bar at which it can go off, let's say hypothetically it is now 6 ft before it goes off. The impact speed at 4 ft is 10mph or 16 feet per second. You literally have to run into a wall so that the gun impacts at precisely the right angle.

What about the latest guy who had his gun go off...a couple years ago... in between load and make ready and the start buzzer? If you are not moving, there's no inertia. A stationary gun doesn't just go off on its own

[sigstroker]

Just like glock leg was abundant when glocks came out.

There is nothing wrong with the p320.
There are over a million of them out there and still no factual evidence of them going off on their own.

Wonder if "going off in the holster" means while drawing.

[Ewok55]

Resulting acceleration spikes from drops vary wildly. CA's drop test only captures a few possibilities of drops and no manufacturing, wear, cleanliness and lubricant variables. A wildly used police and military gun (probably 1/2 mil or more in the US) will be subjected to everything. Odds are an average Joe won't be dropping or grappling a suspect with a loaded. I am more picky about holsters with any strike fire and only carry traditional double actions in some of the less protective deep concealment inside shorts holsters.