Oh, as I was looking over my new pistol, I was wondering what stops the pisol from firing if it is dropped on its hammer? Sig pistols, for example, have a "safety intercept notch" that prevents the hammer from contacting the firing pin when something hits the hammer from behind. Also, in a Sig there is a firing pin block that prevents forward movement of the firing pin unless the trigger is pulled.
On the R9s, I did see that the hammer is recesed into the back of the slide, but I assume we rely on more than that. Does anyone know what passive safetys are built in?