TL;DR: The longer you hold the trigger the more accurate the LMGs become.
The mechanic concept takes inspiration from the new game being made by DICE called BF1. The DEVs asked themselves how they could make LMGs different from the weapons now because in one of their successful games known as BF4, LMGs are essentially less accurate assault rifles with 100+ magazines. DICE decided they had to change the mechanics of the LMGs since it didn’t add much depth to the concepts and overall gameplay, so they revamped one small but crucial mechanic. The longer you hold the trigger the spread becomes more accurate and thus encourages putting bullets down range but being effective while doing it as well.
What if the LMGs did this in the game as well? It first starts off with hip fire that is overall too inaccurate to use and consider in mid range (numbers that I have no knowledge in, essentially lets say the spread looks something like a more accurate sniper rifle than its bolt action counterparts). Albeit when you put enough bullets down range (again, numbers that I don’t believe I have the knowledge to judge) your spread becomes slightly larger than the LMGs starting moving spread in game right now. This is a concept of how they would work, the mechanics will obviously be changed due to balance issues across the board.
I’m not going to recommend changing stats of the weapons themselves and request of you to simply state your opinion on this mechanic If you so wish to. I want to know if this mechanic for the LMGs is good, bad, ugly, or there are better things to focus on besides this. If this mechanic receives enough consideration then maybe the community can expand on it some more by bringing discussion on increasing the mag sizes, what the starting and ending spread is, whether you can iron sight the LMGs, etc…
Thanks for spending the time to read this!