[oflannabhra]

I understand your speculation on the amount of variance, but I haven't seen any data to support it.

Sig's "recall" was a drop-safety issue, where in certain orientations the weight of the trigger could generate enough momentum to allow an unintentional discharge.

[pclmulqdq]

There's plenty of data on the variances of P320 parts being much larger than specified by Sig, and it has been presented in a few court cases. Root causing this issue to tolerances hasn't been done, though.