Gun parts interchange

[Royzo]

Does anyone know if any manuals exist for the interchangeability of gun parts? Or is it just a trial and error thing?

 

[tiriaq]

There are lists of house brand guns with the actual manufacturer. This what you are looking for?

 

[Royzo]

Just curious about whether there is an info source available on the use of parts from one gun to the other ( different models/ brand names ).
It would be handy to have this info to avoid tearing apart numerous parts guns.