Agreed. He shouldn't have revealed how to do it given there maybe some noobs who don't know how.
I don't know how, I have never bothered or needed/wanted to find out.
Levelcap did this when he was reviewing the M16A4 in BF4, mentioned about people using the burst fire macro, low and behold for about a week after I kept getting killed by full auto M16A4's.
Poor show tbh, can only imagine how OP the already OP AN94 will be with a burst fire macro added.