There are a lot of ways to do this.
A line trace would be the easiest way with DebugDrawTraceTag
https://docs.unrealengine.com/latest/INT/Gameplay/HowTo/UseRaycasts/Blueprints/
You could also use DrawDebugLine
Or you could use a beam emitter
There are a lot of ways to do this.
A line trace would be the easiest way with DebugDrawTraceTag
https://docs.unrealengine.com/latest/INT/Gameplay/HowTo/UseRaycasts/Blueprints/
You could also use DrawDebugLine
Or you could use a beam emitter