Destroy, dissasemble
Best left to a gunsmith.
Ask a gunsmith for help
at the top of the tank, you have to dissasemble the tank.
You need a gunsmith
see the link below for the information you need.
Not meant to be disassembled
See the Youtube video link below
timing chain. you do not replace it your self take it to a dealer unless u know how to dissasemble a motor and raise it up from the engine bay a few inches
Go to Remington.com and you can either download or request one.
Best to ask a gunmsith for assistance
Best left to a trained gunsmith.