Why Is This Transparency Function Not Working?

I have made a script where a model is put into the players character but when it is parented to the players character it goes invisible so i made a function where the model should be non transparent but it only runs when the player unequips the tool. Why is this happening?

local Player = game.Players.LocalPlayer
local Tool = script.Parent.Parent
local Events = game.ReplicatedStorage.Calls
local Character = Player.Character or Player.CharacterAdded:Wait()
local WeaponTool = game.ReplicatedStorage.Models["9mm Pistol"]
local Stats = require(script.Parent:WaitForChild("ModuleScript"))
local EquipAnimU = nil
local UnEquipU = nil
local UnEquipE = 0
local IdleAnimU = nil
local Equipped = false


script.Parent.Parent.Equipped:Connect(function()
    if Equipped == false then
        Equipped = true
        local Character = Player.Character
        local Humanoid = Character.Humanoid
        EquipAnimU = Humanoid:LoadAnimation(script.Parent.Parent.Anims.Equip)
        EquipAnimU:Play()
        Events.ConnectM6D:FireServer(WeaponTool.BodyAttach)
        Render() -- Function Call
        wait(0.28)
        script.Parent.Parent.Sounds.Slide1:Play()
        wait(0.1)
        script.Parent.Parent.Sounds.Slide2:Play()
        wait(0.28)
        IdleAnimU = Humanoid:LoadAnimation(script.Parent.Parent.Anims.Idle)
        IdleAnimU:Stop()
        if Tool.Parent == Character then
            IdleAnimU = Humanoid:LoadAnimation(script.Parent.Parent.Anims.Idle)
            IdleAnimU:Play()
        elseif Equipped == true then
            Tool.Parent = Player.Backpack
            IdleAnimU:Stop()
            EquipAnimU:Stop()
        end
 end
 end)

script.Parent.Parent.Unequipped:Connect(function()
    if UnEquipE == 0 and Equipped == true then
        IdleAnimU:Stop()
        EquipAnimU:Stop()
        IdleAnimU = nil
        UnEquipE = 1
        local Character = Player.Character
        local Humanoid = Character.Humanoid
        UnEquipU = Humanoid:LoadAnimation(script.Parent.Parent.Anims.UnEquip)
        UnEquipU:Play()
        wait(UnEquipU.Length)
        Events.DisconnectM6D:FireServer(Player.Character["9mm Pistol"])
        UnEquipE = 0
        Equipped = false
     end
 end)

function Render() -- Function
    game:GetService("RunService").RenderStepped:Connect(function()
        if Equipped == true then
            for i, part in pairs(Character["9mm Pistol"]:GetChildren()) do
                if part:IsA("MeshPart") then
                    part.LocalTransparencyModifier = 0
                end
            end
        end
    end)
 end