Minor Visual Adjustment: I've seen a number of Arma 3 night battles and I have been thinking that there could be a little tweaking done to tracers to make them look a little more realistic and less like lasers. I think the streak of the tracer visual should be decreased so it doesn't make such a solid line.
Secondly: Tracers should only be every 5th round in a magazine.
Tracer rounds in real life:
Tracer rounds in Arma 3: