I wanted a fiber sights for my 45 Win Mag. I got a rear fiber from Ed but the front sight on this barrell was silver soldered on. I didn't want to take a torch to it and risk the barrell so I cut down the front a bit, cut a groove in it, drilled two holes, formed a couple of steel rounds to hold the fiber, epoxied them in and touch up blued them. It worked.
good luck