Some interesting information on the new upgrade:
http://www.thetruthaboutguns.com/201...aded-sig-p320/
They describe the modifications as "three commercial P320s with the reduced-mass trigger, sear, and striker plus the new sear cage and trigger disconnect had been installed."
Interesting quote here:
Quote:
|
Nine drops right on the money, zero discharges. Additionally, zero striker releases. In TTAG’s testing and, from the data SIG showed us, in their testing, there were incidents where the striker slipped off the sear but the striker block safety was still in place and, therefore, the gun did not fire. With the upgrade parts, the incidents of striker release were significantly reduced.
|
So, it appears that in at least some cases previously, the striker was slipping off the sear but being stopped by the striker block. And in some cases the striker block wasn't stopping it. It sounds like trigger mass plays a role; but isn't the whole story.