How would I get this to work with Filtering Enabled?

player = game:GetService("Players").LocalPlayer
Mouse = player:GetMouse()
tool = script.Parent
Ammu = 30
Shoot = false
Rel = false
Eq = false

tool.Equipped:connect(function()
	
		print("Tool equipped!")

	Mouse.Icon = "http://www.roblox.com/asset?id=274723894"	
	Eq = true
	
		Mouse.Button1Down:connect(function()
		if Eq == true then
				Shoot = true
				end
	end)
	
	Mouse.Button1Up:connect(function()
				Shoot = false
	end)
	
	while true do
		wait()
	if Eq == true then
	if Shoot== true then
		if Rel == false then

		if Ammu > 0 then
		Ammu = Ammu - 1
	    tool.Ammo.Value = Ammu
	        
        script.Parent.Sound:Play()
					
		print("Mouse pressed!")
		local ray = Ray.new(tool.Handle.CFrame.p, (Mouse.Hit.p - tool.Handle.CFrame.p).unit * 300)
		local part, position = workspace:FindPartOnRay(ray, player.Character, false, true)
 
		local beam = Instance.new("Part", workspace)
		beam.BrickColor = BrickColor.new("Bright red")
		beam.FormFactor = "Custom"
		beam.Material = "Neon"
		beam.Transparency = 0.25
		beam.Anchored = true
		beam.Locked = true
		beam.CanCollide = false
 
		local distance = (tool.Handle.CFrame.p - position).magnitude
		beam.Size = Vector3.new(0.3, 0.3, distance)
		beam.CFrame = CFrame.new(tool.Muz.CFrame.p, position) * CFrame.new(0, 0, -distance / 2)
 
		game:GetService("Debris"):AddItem(beam, 0.05)
		
				wait(.09)	
			
		if part then
			local humanoid = part.Parent:FindFirstChild("Humanoid")
 
			if not humanoid then
				humanoid = part.Parent.Parent:FindFirstChild("Humanoid")
			end
 
			if humanoid then
				humanoid:TakeDamage(7.5)
				script.Parent.Hit:Play()
				
				wait()
				
						end
		end
		end
		end
	end
	end
	end
end)

game:service("RunService").Stepped:connect(function()
	if Ammu == 0 then
		if Rel == false then
		Shoot = false
						Rel = true
                        script.Parent.Relo:Play()

                    Mouse.Icon = "http://www.roblox.com/asset?id=274724449"

					wait(2)
					
					Mouse.Icon = "http://www.roblox.com/asset?id=274723894"
					Ammu = 30
					Rel = false
end
	end
end)

tool.Unequipped:connect(function()
    Eq = false
Shoot = false
end)

game:service("RunService").Stepped:connect(function()
	script.Parent.Ammo.Value = Ammu
end)

function onKeyPress(inputObject, gameProcessedEvent)
	if inputObject.KeyCode == Enum.KeyCode.R then
		print("R was pressed")
		
						if Ammu ~= 30 then
							if Rel == false then
						Shoot = false
						Rel = true
                        script.Parent.Relo:Play()

                    Mouse.Icon = "http://www.roblox.com/asset?id=274724449"

					wait(2)
					
					Mouse.Icon = "http://www.roblox.com/asset?id=274723894"
					Ammu = 30
					Rel = false


							end
						end
			end
end

game:GetService("UserInputService").InputBegan:connect(onKeyPress)

player.Character.Humanoid.Died:connect(function()
	Shoot = false
end)