What they are talking about is Sigs patented firing safety pin. There is no manual safety, but the gun will not fire unless the trigger is purposely pulled. Even cocked and loaded, if you drop the gun, or for some reason, the cocked hammer strikes forward, it will not hit the pin, it will not fire the live round in the chamber. This safety pin system Sig has incorporated uses some process where the trigger has to be pulled all the way back as if you purposely pulled the trigger for thehammer to actually reach and strike the pin. Excellent safety feature and technology IMHO.