So I have been trying to find a way to add muzzle flashes to vehicles and turrets when they fire. I already used this code and inputed it into a turret's weapon bldg:
But is it doesn't seem to work. I have changed the value and tried it on a vehicle's weapon, but it also doesn't work. Also, is there a why I can make a custom muzzle flash from making it in the particle editor? Because I also want to add an explosion effect from the muzzle when a unit fires a rocket.

This topic here tells you how to add a muzzle flash to turret and vehicle weapons. It was found using the forum's Search function.