I haven't put mine back together but JB weld will be the "stuff" of choice. Rebuilding that barrel will be a winter project. Mine is serial number 000152783. What's your serial number. It would be interesting to determine if the factory in China stopped knurling them or started knurling them at some point.
It's fixed. The accuracy is back. It's hitting the teaspoon spinners again at 25 yards every time. It is no Diana 34 but if you like fixing air rifles the Air Hawk and its variants can be made into good shooters for under $100.Jon