Front sight is sweated on. There is no cut for a receiver sight. Probably had a barrel band rear sight originally as there are no holes in the barrel. There seems to be some type of a sleeve arrangement with a barrel stub from a military rifle where it comes out of the receiver that I do not understand. Nor did the FFL dealer who is a fair gunsmith. I formed a case and it measures out to be a 6.5X61 as best I can tell. It did not form as completely as I would have liked because my forming load was a little too mild.