How do get the playermouse with FE?

how would i make a Part fire towards the mouse with FE on?

 local bv = Instance.new("BodyVelocity", CylinderMesh.Parent)
      bv.velocity = CFrame.new(CylinderMesh.Parent.Position, Mouse.Hit.p).lookVector*85
      bv.maxForce = Vector3.new(math.huge, math.huge, math.huge)

This is in a remote event in a server script

Mouse is defined in a local script that fires the remote event containing this code while passing Mouse which is a variable for Mouse = Player:GetMouse()

that only works in Studio because for some reason in online the Mouse is nil.

I already tried to pass Mouse as Mousey = Player:GetMouse() Mouse = Mousey.Hit and changed the code to

 local bv = Instance.new("BodyVelocity", CylinderMesh.Parent)
      bv.velocity = CFrame.new(CylinderMesh.Parent.Position, Mouse.p).lookVector*85
      bv.maxForce = Vector3.new(math.huge, math.huge, math.huge)

but When I change it to this it doesnt work properly in both studio and online. Halp plz