First person viewmodel error?

I'm currently coding a first person viewmodel. I'm trying to weld a brick to the camera's CFrame and weld all the other bricks (ex. arms, legs, gun) to that. It works fine for two arms, but when I add some more welds, my arm welds break.

local player = game.Players.LocalPlayer
local character = game.Workspace:WaitForChild(player.Name)
local cam = game.Workspace.CurrentCamera
local r = game:GetService("RunService")

wait(0.5)

-----------------------------------------------------------------------------

_G.weld = function(Part0, Part1, offset)

    local weld = Part1:FindFirstChild("Weld")

    if weld == nil then

        weld = Instance.new("ManualWeld", Part1)

    end 

    weld.Part0 = Part0
    weld.Part1 = Part1
    weld.C0 = offset

end

local function strip()

    local allowed = {"Health", "Sound", "Head", "HumanoidRootPart", "Humanoid", "Torso", "Right Leg", "Left Leg"}

    for i, v in pairs(character:GetChildren()) do

        local destroy = true    

        for j, k in pairs(allowed) do
            if v.Name == k then
                destroy = false
            end 
        end

        if destroy == true then
            v:Destroy()
        end

    end

    character.Humanoid.Animator:Destroy()

end

local function createCamRef()

    camRef = Instance.new("Part", character)
    camRef.Name = "camRef"
    camRef.CanCollide = false

end

local function createBodyPart(name, offset, size)

    local newPart = Instance.new("Part", character)
    newPart.Name = name
    newPart.CanCollide = false
    newPart.Size = size

    r.RenderStepped:connect(function()

        newPart.LocalTransparencyModifier = 0

    end)

    _G.weld(camRef, newPart, offset)

end

local bindCamRef = coroutine.wrap(function()

    while true do
        camRef.CFrame = cam.CFrame
        r.RenderStepped:wait()
    end

end)

-----------------------------------------------------------------------------

strip()

createCamRef()

createBodyPart("rightArm", CFrame.new(0.91988802, -1.18999767, -1.57000494, 0.982510507, 0.186142579, -0.00514012296, 0.00506633893, -0.0543143377, -0.998511076, -0.186144501, 0.981021106, -0.0543073677), Vector3.new(0.5, 2, 0.5))

createBodyPart("leftArm", CFrame.new(0.479999006, -1.36999798, -1.58000302, 0.973334193, -0.229391918, -5.92261415e-07, -0.0469625145, -0.199264362, -0.978819549, 0.224533245, 0.952718794, -0.204723582), Vector3.new(0.5, 2, 0.5))

bindCamRef()