[zxcvbn4038]

I recently bought a SIG P320, and a week later, I started reading articles about it self discharging. =P It’s not like it happens all the time, but it seems that if the safety lever spring’s thickness is off by a thousandth of an inch, and the height of the post it fits on is also off by a thousandth of an inch, and you drop the pistol at just the right angle with enough force, the FBI reportedly got it to discharge once during testing—though officially, the results are inconclusive. Now, some law enforcement agencies are quietly replacing the P320 with the Glock 19. Personally, I’m keeping mine because it’s a great gun, and I love that 21-round magazine. However, I sent in my warranty card in case there’s a recall or something similar.

[GiorgioG]

Odds are, you'll never experience the self-discharging issue. Having said that, I don't find a mostly-reliable firearm acceptable from a safety perspective. If I don't pull the trigger, it cannot go bang, ever, for any reason.

[303uru]

I’m not taking odds on an edc item which takes a lot of banging around. Glock 18 is a simple choice.

[spacephysics]

Their report outlined here and the police officer’s account of the unintentional discharge occurred without dropping and while securely in the holster without any items intruding in the holster (i say that because it was a prior excuse Sig made for the unintentional discharge reports)

https://youtu.be/LfnhTYeVHHE

[lambdasquirrel]

A thousandth of an inch would do it? They couldn't give more margin-of-safety to a critical part like that?

A thousand of an inch isn't such a theoretical number. It's about 25 microns, and I've shimmed one of my back-focusing photography lenses for less than that much (about 10 microns, to be specific). This is something that they ought to be able to machine for, but depending on the context, it might not leave much room for error.

[gottorf]

> A thousandth of an inch would do it? They couldn't give more margin-of-safety to a critical part like that?

If it's true, that's truly terrible design.

[halyconWays]

At least one of those critical components (P/N 1300739-R) is manufactured in India. Is that a contributing factor?