How can we create a working fire extinguisher?

[DanZaidan]

Here is some info on what Majin suggested - Line Traces (or Shape Traces).

Blueprint Line & Shape Traces | Live Training | Unreal Engine

https://docs.unrealengine.com/latest/INT/Gameplay/HowTo/UseRaycasts/Blueprints/

Unreal Engine 4 Tutorial - Simple Line Trace Weapon - YouTube