If Crosman does not have the bolt, JG Airguns did the last time I checked. (their store site is currently down) Throw a pump cup and breech seal in while it's open. (if you have pulled the pump) They are the same as any other Crosman. Putting it together again will be easier if the pump and barrel are pre-assembled and held with the bbl band. An object that holds the bbl/pump assy level also helps. I use a pencil under the tube HTH Bart