An error keeps popping up even though it appears nothing is wrong?

So I was creating a script, Full code is now included, sorry.

local tool = script.Parent
local handle = tool:WaitForChild("Handle")
local Rdy = tool:WaitForChild("Ready")
local beam = tool:WaitForChild("Beam")
local smoke = beam:WaitForChild("Smoke")
local rel = beam:WaitForChild("Reloading")
local fir = beam:WaitForChild("Blast")
local bep = beam:WaitForChild("Beep")
local plr = tool.Parent.Parent
local char = plr.Character or plr.CharacterAdded:Wait()
local DS = game:GetService("Debris")

tool.Activated:Connect(function()
	if Rdy.Value == true then
		Rdy.Value = false
		rel:Play()
		beam.BrickColor = plr.TeamColor
		wait(4.5)
		for a = 1,50 do
		local bullet = Instance.new("Part",workspace)
		fir:Play()
		bullet.Size = Vector3.new(.1,.1,1)
		bullet.BrickColor = plr.TeamColor
		bullet.Material = "Neon"
		bullet.CFrame = beam.CFrame + Vector3.new(0,0,-1.5)
		bullet.Velocity = beam.CFrame.lookVector * 250
		bullet.Touched:Connect(function(hitpart)
			if hitpart.Parent:FindFirstChildOfClass("Humanoid") then
				local h = hitpart.Parent:FindFirstChildOfClass("Humanoid")
				local hplayer = game.Players:GetPlayerFromCharacter(hitpart.Parent)
				if hplayer.TeamColor ~= plr.TeamColor then
				print("Bullet hit "..hitpart.Parent.Name.."!")
				h:TakeDamage(2)
				end
			end
			DS:AddItem(bullet,2)
		end)
		end
		beam.BrickColor = BrickColor.new("Really black")
		wait(10)
		beam.BrickColor = BrickColor.new("Br. yellowish orange")
		for a = 1,5 do
			bep:Play()
			wait(.5)
		end
		wait(1)
		beam.BrickColor = BrickColor.new("Shamrock")
		Rdy.Value = true
	end
end)

Nothing seems wrong in it, yet whenever the bullet touches things it just displays " Players.gamemaster60788.Backpack.Power Cannon.Main:28: attempt to index field 'Parent' (a nil value)"

Any help?