[solved]

Problem was that the ChildAdded function triggered too. For some reason the 2nd animation fired after i update my character model (By un-equipping the tool).

Fixed this by adding

if #script.Parent:GetChildren() == #game.StarterPack:GetChildren() then

[--------]

The code below runs an animation, equal to the name of the tool, on equiping. For some reason, it also runs the animation on unequipping, even though i never call PlayAnimation() on Unequipped. Why could this happen?

If more detail is required, feel free to comment below.

local Animations = {
    ["Minigun"] = 589289270,
    ["RocketMinigun"] = 589289270    ,
    ["AK47"] = 0,--todo
    ["Mosin nagant"] = 0--todo    
}
function PlayAnim(ToolName)
    local a = Instance.new("Animation")
    a.AnimationId = "rbxassetid://"..Animations[ToolName]
    local h = game.Players.LocalPlayer.Character.Humanoid
    local t = h:LoadAnimation(a)
    t:Play()
    a:Destroy()
end

function CreateToolLibrary(Tool)
    Tool.Equipped:Connect(function()
        PlayAnim(Tool.Name)
    end)
end

wait(0.1)

script.Parent.ChildAdded:Connect(function(Child)
    if Child:IsA("Tool") then
        CreateToolLibrary(Child)
    end
end)

for _,v in pairs(script.Parent:GetChildren()) do
    if v:IsA("Tool") then
        CreateToolLibrary(v)
    end
end
AnonymousEdited