How do you put a BB gun back together?
The reverse of how you took it apart. I would look on the web to try to find drawings of how to assemble the BB gun. Try looking at the company that made the BB gun first, some offer drawings of the gun and how to assemble it. www.Crosman.com offer this for most of their guns. OR you can take it to an Airgun repair shop to heve it re-assembled. Check “Airgun repair” on the Net and find a shop close to you.