How Do I Fix This Gun Script? It Always Does 50 Damage Even Though I Don't Want It To

It's a local script inside a tool (the tool has a handle also), inside the starterpack. I made it so that if you shot someone's torso or head it would do 50 damage, and if you shot someone's legs or arms it would do 25 damage. I tested it on dummies containing humanoids that have 100 health, and my gun would always do 50 damage. Whether I shot the head, torso, arms, legs, it would always do 50 damage, no matter what! So what did I do wrong here, and how do I fix it? This is the script:

local tool = script.Parent
local player = game:GetService("Players").LocalPlayer
 
tool.Equipped:connect(function(mouse)
	mouse.Button1Down:connect(function()
		local ray = Ray.new(tool.Handle.CFrame.p, (mouse.Hit.p - tool.Handle.CFrame.p).unit * 50)
		local part, position = workspace:FindPartOnRay(ray, player.Character, false, true)
 
		local beam = Instance.new("Part", workspace)
		beam.BrickColor = BrickColor.new("Black")
		beam.FormFactor = "Custom"
		beam.Material = "SmoothPlastic"
		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.Handle.CFrame.p, position) * CFrame.new(0, 0, -distance / 2)
 
		game:GetService("Debris"):AddItem(beam, 0.1)
 
		if part then
			local humanoid = part.Parent:FindFirstChild("Humanoid")
 
			if not humanoid then
				humanoid = part.Parent.Parent:FindFirstChild("Humanoid")
			end
			
			if humanoid.Torso or humanoid.Head then
				humanoid:TakeDamage(50)
			elseif humanoid.RightArm or humanoid.LeftArm or humanoid.RightLeg or humanoid.LeftLeg then
				humanoid:TakeDamage(25)
			end
		end
	end)
end)

The character's limbs do not reside in the Humanoid, they are directly in the Character model.

Also, you have to actually compare 'part' to the limbs, otherwise you're just checking if those limbs exist or not.

local tor,head = part.Parent.Torso,part.Parent.Head;
local rarm,larm = part.Parent.RightArm,part.Parent.LeftArm;
local rleg,lleg = part.Parent.RightLeg,part.Parent.LeftLeg;

if part == tor or part == head then
	humanoid:TakeDamage(50)
elseif part == rarm or part == larm or part == rleg or part == lleg then
	humanoid:TakeDamage(25)
end