My Smith & Wesson 12 gauge semi-auto shotgun misfires…any suggestions?

November 26th, 2009 by eranio

I’ve got an older S&W semi-automatic shotgun. At random, about every 1 in 10 shells doesn’t fire. The hammer hits the primer in the shell and leaves an indentation, but the shell doesn’t fire. A local gunsmith said he couldn’t fix it because parts are impossible to find. Is this true? Anyone know where I can get it fixed or if fixing is even a viable option?