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?