[HELP] Someone can tell me how that work ?

Hello everyone, so i love tweak the weapons of this mod, but i have a question about deviation and recoil system..

How work the files with many things like v_arg and things like that ? PR have only one file with alls the weapons déviation, i want to create something like this , i look everywhere but can't find any tutorial about that

Thank you for explain me how that work :)