See the link below, This is a Crosman Quest 1000
Crosman still has parts for this model. It is listed as "C1K77" better known as a Quest 1000. Contact Crosman "customer service" to order parts. See the link below. Customer Service is listed at the bottom of the web page.
See the Crosman link below and select your rifle for the diagram and owners manual.
See the link below it has all the Crosman Owners and Parts manuals online.
See the attacked link from Crosman for the parts diagram. See the Link Below.
Crosman had made over 100 different models. It would help if you stated the model you want to reassemble.
Crosman owns Hahn... See the link below.
Crosman has all their parts and owners manuals on line. Their are 4 different versions of the 2200. See the link below and select your model, then if available order them from crosman
See the link below for the parts manual.
Go to the attached Crosman web page and locate your 357 parts manual. It is about 1/2 way down the list. ( See the link below)
See the attached link below for the parts diagram. This pistol was made between 1953-54. Crosman no longer has parts for it. However they offer a free locater of shops the repair Crosman antiques.
You need to state the model number. If you want to take the time go to the Crosman link below and locate your model it will most likely have a parts diagram to identify parts and their location in the pistol. Click on "download a manual" at the bottom of the linked page.