Not much to add Brent,dove-tails for front and rear sight,two 1/8 shallow location holes under forearm.Rifling is cut with a left hand twist.I don't know that Sharps made it ,perhaps S.Wilbur made it to fit a Sharps.I think it would look right on a 63 conversion.A few years ago every other gunshop had 63... with a rusty 50-70 barrel on the rack,where did they all go?