Well, if as you say the pin is tipped in soft metal (Al, Cu, Mg), the strike-mark would change after just a couple of firings. And anyway it could be replaced per your description of the design, with every use if need be.
Of course, by that stage of things, Obama's thugs would be murdering people out-of-hand just for having one.
People will die, we don’t live forever, its how we live and how we are remembered after we die. It would sooth my soul forever to hear my ancestors passing on from generation to generation about how I died, how I made a stand against overwhelming odds, how my blood fed the Tree of Liberty.