Thank you all for great feedback!
Next part is pistol port.
Interesting solution with handle.
It was manual handle and not a cylinder
and locked in close or open position.
Sorry, I accidently erased picture with parts.
I want to point some mistake here - parts 334a and 334b must be glued on
1 mm cardboard (**) and not as marked on 0.5 mm (*).
I noticed it only when i tried to put skin on those.
Luckily, it was easy to correct the error.
Handle was glued only after i glued port door.
