Script helping mouse

Help and Feedback Scripting Support
#1

Script:

local tool = script.Parent

tool.Activated:Connect(function()
	local Owner = tool.Parent.Name
	local player = game.Players:FindFirstChild(Owner)
	local mouse = player:GetMouse()
	local ray = Ray.new(tool.Barrel.CFrame.p, (mouse.Hit.p - tool.Barrel.CFrame.p).unit*300)
	local hit, position = game.Workspace:FindPartOnRay(ray, Owner)
	script.Parent.Handle.Fire:Play()
	local humanoid = hit and hit.Parent and hit.Parent:FindFirstChild("Humanoid")
	if humanoid then
		humanoid:TakeDamage(15)
	end
	local distance = (position - tool.Barrel.CFrame.p).magnitude
	local rayPart = Instance.new("Part", Owner)
	rayPart.Name          = "RayPart"
	rayPart.BrickColor    = BrickColor.new("White")
	rayPart.Material	  = "SmoothPlastic"
	rayPart.Transparency  = 0.5
	rayPart.Anchored      = true
	rayPart.CanCollide    = false
	rayPart.TopSurface    = Enum.SurfaceType.Smooth
	rayPart.BottomSurface = Enum.SurfaceType.Smooth
	rayPart.formFactor    = Enum.FormFactor.Custom
	rayPart.Size          = Vector3.new(0.2, 0.2, distance)
	rayPart.CFrame        = CFrame.new(position, tool.Barrel.CFrame.p) * CFrame.new(0, 0, -distance/2)
	game.Debris:AddItem(rayPart, 0.02)
end)

The Error: Players.Player1.Backpack.gun.Gun:7: attempt to index nil with ‘Hit’

#2

If mouse is nil, then you’re retrieving the mouse from the server, you can only retrieve it from the Client so you’ll most likely need to change your code to use a RemoteEvent where the client passes in the position of where the mouse hit, and the server does the damaging and showing of the bullet

#3

If i will use remote event code flow slows down. is there any other solution?