Thanks for the reply. I am not sure I could find the patience or skill to do the octagoning the whole length of the barrel as only have angle grinder, files, dremel and sand paper to work with. To do the straight areas of barrel is one thing, but to do the flats along the taper of barrel could be tricky. Also would have to look at how thin it would become as this is a relatively thin profile barrel. I am interested in what others think and possible things to look out for or how to ideas.
Thanks Don.