Crosman owns Hahn... See the link below.
I suggest that you go online and search for "Air gun repair" and locate a shop near you for repairs. Hahn/Crosman no longer repair this BB gun.
See the link below for your answer. The Hahn is the same pistol as the Crosman model 36
It looks like an old Colt 45. See the link below.
Today Crosman air gun company owns the rights to the Hahn BB line of air guns. The rifle was made between 1958 to 1971. See the link below for a detail drawing of the parts.
Hahn BB guns are owned by Crosman air gun company. The Hahn repeater is a Crosman model 166. See the link below for the Parts and Owners PDF.https://support.crosman.com/hc/en-us/articles/203543160-166-Owner-s-Manual-EVP-1958-1971-
You could use the Yellow pages or something similar and try looking under air gun supplies etc. You could Google the user manual or repair tutorials if there are any. You could contact the manufacturer for advice. You could see whether there is a phone number on the box if you still have it.
If its a BB Gun, Then Yes.
Where do I find it
BB gun. Fires a round BB.
It's a BB Gun.
Which model, what is the condition of the BB gun or is it a BB rifle..
Benjamin Breckinridge Warfield did not invent the BB gun.