I'm ordering a new grip module for the new-to-me P320SC this week, and while I'm at it, I should consider consolidating an order for standard spare parts (consumables) that require routine replacement or have a low mean time between failure.
What should I have on hand?

A guess is have a spare for the recoil spring assembly: replace at 5k rounds for a steady diet of +P loads, replace at 10k rounds for std velocity loads.

ETA: I assume we're talking about post-upgrade parts, right?

This message has been edited. Last edited by: chantico2019,

It turns out that there is a factory spare parts kit for thr P320 Compact, Carry and Subcompact.
It has the recoil assembly, slide catch lever spring, pin and base. It seems fair to guess that these are the critical parts that require replacement most often. $30

https://www.sigsauer.com/store...-357-sig-40-s-w.html

https://www.sigsauer.com/store...t-parts-kit-9mm.html