Hi!
I’m using the Spawn System at Location node for a weapon BP, but the Particle System is always misaligned (rotation inly)compared to the gun itself.
To fixed i tried with (component) > Get world rotation > Spawn System at Location
or
Get Player Character >Get Actor Rotation > Spawn System at Location
but the PS is always facing the wrong direction. How can i fix it? In terms of PS im a rookie so maybe the issue is within the PS System tho
Try setting ‘local space’ in the particle system ( I’m assuming it’s Niagara ).
It is in Local Space 
I also tried with Emitter properties - add velocity - rotation world and local, but nothing
Ah, then it could be more trick, and depend on the actual particle settings…
Hmm i modified the code to replace Niagara with Cascade FX and i got a similar problem, but no the same. Now Right and Top are working (positive values) but Left and Down are still bugged
I think it’s just the way the particle system is written…
I totally forgot the alignment of the Particle System (Camera Facing options) now its working 
where have you found those options?, struggling with the same.
I had the same problem of the particle system not following a certain spawn rotation. So I changed it to Local space under required in the cascade particle system
