Need help from a Glock Ninja

[FortTom]

I don't know about the C models, but I do know the original PF940's marketing specifically includes .357sig as a viable build option. I wouldn't be concerned about frame strength. The new versions, while slimmer, also have structural upgrades like steel rail inserts. And, if worse comes to unforeseeable worse, and you do have a frame crack, p80 will send you a new one.

Thanks. I'll give them a call and see what they have to say.