Ah, okay, so you're not asking "which one does the book say", you're asking "do the rules say I can't do this". The no, if the description of "controlled and fully automatic bursts" and two examples isn't enough, there's nothing that explicitly says you cannot use it with other firing modes.
No, I'm saying there's nothing in the rules that says FA is the assumption.
What's your basis for saying, for example, a Semi Automatic burst is
not a controlled burst?
ah since you edited your response, I think I see we may have been talking past each other due to some syntactic ambiguity in the rules. What does "controlled and fully automatic bursts" actually mean?
I've been reading it "controlled bursts and fully automatic bursts"
You seem to read it "bursts that are both controlled AND fully automatic".
If that's our wrinkle, then yeah we won't convince each other. It's just how you read the rules... but I do think it's a bit self-righteous to say anything other than your way is a house rule
It's how the GM reads plain language.