I’m kinda new on UE, so any help Is very welcome.
I want to shoot the arrow on the mouse direction only to the Z and Y directions, Up, Forward etc (Black in the picture)… But when I change the mouse position goes to the X (in red) deeper, how can I change that?
Sorry for my bad english, and thank you in advance. 
The simple option to fix this would be to take the location from the ‘Break Hit Result’, break it into it’s separate float values and then make a new Vector3 that use the Y and Z from the ‘Break Hit Result’ and then just set the X value to the X location of the player pawn.
This though is going to have one problem, as you target things further from the X depth of the player pawn you are going to see that the arrows aren’t going towards the mouse position. In order to fix this I would suggest taking the hit location and calculating where it would be if it was extended to the player X depth.
Math would look something like this
Mouse Hit Direction = Normalized Vector of (Hit Location – Camera World Location)
Target Location = Mouse Hit Direction * (Camera World ‘X’ Location / negative Mouse Hit Direction ‘X’) + Camera World Location
