I just picked up a 586 4-inch and would like to replace the red ramp front sight with a patridge/gold bead. Can the factory do this? I note the front sight is not pinned on. Thanks.

You'd be better off contacting Hamilton Bowen or David Clements to do that type of work. I know Bowen does a lot of different sight set-ups for S&W revo's.

http://www.bowenclassicarms.com/

http://www.clementscustomguns.com/