I've owned 2 p220 sigs and one p226. The p226 was the oldest one and it did rust.these were basic model ones. I think maybe the navy seal edition, the elites and the black water won't rust. But I'm not sure if every part including magazine parts is stainless steel or aluminum. If Sigs rust then H&K usps are the best. Maybe after that I would say a XD. Just from what I've heard about them.Then last place comes a glock.
I got no beef with berreta. They make stainless steel 9mm pistols. So they won't rust. I had the chance to buy a used blued steel one in 9mm but I passed it up because I personally think they don't look good. This was a Model 92.
What the hell?
You do realize that any steel will rust, even stainless steel, or melonited steel (Glock calls it tennifer)?
That's why firearms are finished/treated, including everything from using stainless steel for more corrosion protection (not rustproof) to parkarizing, bluing, nickle plating, or finishing with spray on finishes.
And once the firearm is finished, we oil it.
If you are letting your guns rust up (and I seriously doubt you've owned actual Sigs) then you are not taking care of your **** and are just asking for failures.