I'm making a gun with animations and I'm having mutliple problems, help?

I'm making a gun, and decided to add animations and make the player's arms follow the mouse. I have a problem and a question.

Firstly, I'm having a weird problem, I have the gun, but when I duplicate it, the second one's "follow camera" system doesn't work.. Here's the code

local plr = game.Players.LocalPlayer

repeat wait() until game.Players.LocalPlayer.Character
local char1 = plr.Character
local Anim = char1.Humanoid:LoadAnimation(script.Parent.Idle)

local RightArm = char1.Torso["Right Shoulder"].C0
local LeftArm = char1.Torso["Left Shoulder"].C0
local Neck = char1.Torso["Neck"].C0

local ChangeVariable = false

repeat wait() until game.Players.LocalPlayer.Character

local char = plr.Character
local m = plr:GetMouse()

game["Run Service"].RenderStepped:Connect(function()

    if script.Parent.BoolEquipped.Value == true then

        local c = game.Workspace.CurrentCamera
        char.Torso["Right Shoulder"].C0 = CFrame.new(1,0.5,0) * CFrame.Angles(-math.asin((m.Origin.p - m.Hit.p).unit.y),1.55,0)
        char.Torso["Left Shoulder"].C0 = CFrame.new(-1,0.5,0) * CFrame.Angles(-math.asin((m.Origin.p - m.Hit.p).unit.y),-1.55,0)
        char.Torso["Neck"].C0 = CFrame.new(0,1,0) * CFrame.Angles(-math.asin((m.Origin.p - m.Hit.p).unit.y) + 1.55,3.15,0)

    else

        local c = game.Workspace.CurrentCamera
        char.Torso["Right Shoulder"].C0 = RightArm
        char.Torso["Left Shoulder"].C0 = LeftArm
        char.Torso["Neck"].C0 = Neck

    end

end)

script.Parent.Unequipped:Connect(function()

    char.Torso["Right Shoulder"].C0 = CFrame.new(0,0,0)
    char.Torso["Left Shoulder"].C0 = CFrame.new(0,0,0)
    char.Torso["Neck"].C0 = CFrame.new(0,0,0)

end)

script.Parent.Equipped:Connect(function()

    Anim:Play()

end)

script.Parent.Unequipped:Connect(function()

    Anim:Stop()

end)

I also have a question, does anyone know how can I make it so that the character's arms follow the mouse, but in a server script?