This Bouncing Laser script, will create a Line Renderer laser, that will reflect on any collider, for as many times as you would want it!
Everything can be customized; the laser itself (width, color, length etc.), the impact points (What happens when a laser hits an object, and what does it look like), the information it returns (, etc.
Included is also a laser shooter object, that can be constrained to the specific need that you might have for it, such as constraining the axes it can move on, etc.