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P320 internal safety animation?

This is a discussion on P320 internal safety animation? within the P250 & P320 Modular Pistols forums, part of the SIG Sauer Pistols category; Is anyone aware of an animation demonstrating the internal safeties of the P320? I am curious about the operation and what features make it so ...


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P250 & P320 Modular Pistols P250, P320, and Exchange kits

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Old 12-30-2016, 10:29 AM   #1
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P320 internal safety animation?

Is anyone aware of an animation demonstrating the internal safeties of the P320?

I am curious about the operation and what features make it so that it absolutely can't fire unless the trigger is positively pulled.
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Old 12-30-2016, 10:39 AM   #2
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This is an animation I made some while back in another conversation comparing the Sig P320 and Glock trigger mechanisms. This at least shows how the 'blocking lever' (blue) is lifted by the trigger pull...as opposed to a firing-pin-block plunger being pushed up.





Both essentially do the same function, blocking the striker from going forward under momentum from being dropped or struck enough to strike a primer unless it is lifted out of the way during the takeup on a trigger pull. But pretty much all semi auto pistols have a 'blocking plunger' that is lifted out of the way by a trigger pull takeup....in the case of a hammer-fired gun, to guard against firing from the aforementioned momentum and/or being dropped on its hammer. Earlier 1911's didn't, but started to with the 'Series 80' versions.

The Glock and other pistols have that little extra trigger tab safety which is really more of a drop safety....in that it hinders the metal trigger bar from moving rearwards under momentum if the pistol is dropped or hit hard on the rear. The P320 doesn't need this (even though it's technically available as an option) because unlike the trigger shoe-to-bar linkage in other striker-fired pistols, the P320's trigger bar actually pulls forward when the trigger shoe is pulled rearward. So with any sharp impact on either end of the pistol, the momentums of both the trigger shoe and bar would essentially cancel each other out being in different directions. But with a Glock, PPQ, and M&P for example...both the trigger shoe and bar move rearward as it's fired....hence the little trigger-lever dingus that stops that unless the trigger is actually pressed manually.

Last edited by MoRivera; 01-02-2017 at 08:37 AM.
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Old 12-30-2016, 10:46 AM   #3
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Thank you!
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Old 01-01-2017, 10:53 PM   #4
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Ingenious design.
Thanks for the animation.
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Old 01-02-2017, 02:38 AM   #5
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Good info Mo' Thanks
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