Agreed, I have walked in many a round on target watching tracers from a machine gun. At night it’s a beautiful sight as long as you are not receiving the fire.They work the best in full auto weapons. They are not hard to see from a M2 50 cal. the belts are loaded with every 5th. round being a tracer. When fired you will see a line where the bullets are going, this is the way we aimed them. Kind of like and etch a sketch.