I look at it this way...any manufacturer will have an issue, even more so with a new design. This is true for guns, cars, dishwashers, etc. I don't judge SIG any more than I judge Smith & Wesson, Ruger, Winchester, or any of the other major gun companies that have had recalls. If it becomes an ongoing and frequent issue, maybe I'll worry. Until then, my SIG is my carry gun, with full confidence. Granted, I don't have a P320...
All that said, I'm curious about this issue, because it's not just drops that cause it, but the hammer strikes as well...