The manual mentioned above is a copy of all the blueprints of the parts used in the M84 scope.
There are no instructions on how to tear them down, reassemble or make adjustments.
If you want to make parts it is great and also it will visually show you how they assemble.
They are NOT a good scope and compared to the Britishand Canadian
a piece of caca popo.
There are a couple of proprietary tools you will need to work on the M84 scope and it good for working on making those.
I normally make a set of tools for each M84 I work on and just include most of them with the scope when I return it.