Why isn't my animation playing for my custom viewmodel?

Hi everyone!

I am having trouble with playing animations for my custom viewmodel I have made. The animations work fine if I put the viewmodel in Workspace, but they just wont play if they're in the camera. I also get no error messages in the console.

Here's the code for the view model:

--//Variables\\--
local cam = workspace.CurrentCamera
local reps = game:GetService("ReplicatedStorage")
local runs = game:GetService("RunService")
local Magnum = reps:WaitForChild("Gun"):Clone()

--//Connecting To The Camera\\--
for i,v in pairs (Magnum:GetChildren()) do
	if v:IsA("BasePart") then
		if v ~= Magnum.PrimaryPart then
			local weld = Instance.new("Weld")
			weld.Part0 = Magnum.PrimaryPart
			weld.Part1 = v
			weld.C0 = Magnum.PrimaryPart.CFrame:inverse()
			weld.C1 = v.CFrame:inverse()
			weld.Name = v.Name
			weld.Parent = Magnum.PrimaryPart
		end
	end
end

Magnum.Parent = cam

--Viewmodel Position--
runs.RenderStepped:connect(function()
	Magnum:SetPrimaryPartCFrame(cam.CFrame*CFrame.new(0,-2,-2))
end)

I also made a separate script that goes into the viewmodel. Here's the code:

local Magnum = script.Parent
local Hum = Magnum:WaitForChild("Humanoid")
local Animations = Magnum:WaitForChild("Animations")

--//Animations\\--
local Hold = Hum:LoadAnimation(Animations.Hold)
local Idle = Hum:LoadAnimation(Animations.Idle)

--Looped Animations--
Hold.Looped = true
Idle.Looped = true

Idle:Play()

Help is appreciated! Thanks!

Are you certain you rigged it correctly?