Most efficient way to make tracer machingun fire? (raycast or rigidbody)

Im trying to shoot a line of tracer fire and have it act like a hose similar in plane games you fire and the bullets continue in the path they were shot so there is that lobbing effect when you shoot in front of something. What would be better for my needs? A raycast that is broken up into pieces or a long rigidbody with a mesh of 3 or 4 bullets? Or is there something even better than these two that i can use?