Rebuilding my whisper cat

I mean, I thought of that - most of the videos omit the actual seal removal / replacement, but I figured that part out. Still havent been able to remove the chamber by the breach, at least not easily.

Question about the lube - do i use moly on the outside of the cylinder, and inside too? or should only the black tar go on the inside of the cylinder and spring, no moly?

Ironically thats the same video i stumbled upon when I figured the seal out, but, either I'm not using the right terminology (quite likely), or perhaps I'm addressing a component that does not exist in my rifle in particular, or perhaps both - it's been known to happen.

The first video i watched came from my other thread on whisper cat ballistics, at 04:50s in

Video:
Obviously the whisper cat does not have a rotating cylinder / chamber, but, at the breach it would stand to reason there should be some kind of seal in the breach to be replaced.

So, to reword my question, at the breach of a whisper cat, I am trying to identify any removeable parts that need to be removed and cleaned.

Or, to put it yet another way, is there anything I should be looking to remove between the maincylinder seal and the breach of the barrel?

Sorry if my post has been misleading, this is my first gun tear-down, ever, and experience has taught me to ask stupid questions instead of making stupid mistakes. I realize it is common sense for most, but, it isnt for me.

No I definitely appreciate it - I subscribe to the notion of "doing is learning," despite my lack of experience I want and need to learn this stuff. It's not a super expensive gun and I plan to continue the hobby, so it's better for me to learn on a gun that was already three-quarters to the grave.