I have a sword attached to my character via a socket what would be the best way to do a line trace for it cheers
Not sure exactly what you are asking here. Are you unsure how to do a line trace in unreal or do you mean “How do i detect if it hits something”?
Line traces are simple blueprint nodes, just right click in your blueprint and type Line Trace.
https://docs.unrealengine.com/latest/INT/Gameplay/HowTo/UseRaycasts/Blueprints/