ORIGINAL: UncleNorby
From what I've been told, dry firing will not harm relativley "new" guns. I don't know how old a gun has to be for it to be a concern.
It's noty AGE that's the problem! It's striker/firing pin design. An M98 Mauser made in 1898 will stand as much dry firing as one made yesterday! BTW, the ONLY firing pin I've ever broken by dry firing was the frame-mounted, "floating" pin/spring assembly in a Colt .357 Magnum revolver! The pin boke off of the "button" it was part of.