How would I fix this script for the guns I am developing?

I made this script for some guns I'm working on, and I cannot seem to get the guns to shoot, I'm not sure what I am doing wrong, any of you able to help? This is what I have so far.

local tool = script.Parent
local player = game:GetService("Players").LocalPlayer

tool.Equipped:connect(function(mouse)
	print("Tool is equipped")
	
	mouse.Button1Down:connect(function()
		print("Mouse has been 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("Crimson")
		beam.FormFactor = "Custom"
		beam.Material = "Neon"
		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.Firepiece.CFrame.p, position) * CFrame.new(0,0, -distance / 2)
		
		game:GetService("Debris"):AddItem(beam, 0.1)
		
local humanoid =  hit.Parent:FindFirstChild("Humanoid")
				if humanoid then
					if hit.Name == "Head" then
						--Double damage on headshots
						humanoid:TakeDamage(50*2)
					else
						--Normal Damage on body shots
						humanoid:TakeDamage(50)		
		
		
	end)
end)