I have two of these. Was thinking of getting one rebarrelled to 50-70. Would make the conversion somewhat easier with the larger case head and with BP would serve to keep the pressures down. This is not a split receiver nor are there circlips holding the various parts in place. 24-26 octagon bbl,Parker Hale globe front sight with lee shaver inserts (got a deal on these from sarco. and maybe some form of receiver sight. Should look nice and be effective at least out to 2 hundred yards. Any comments or suggestions. Frank