How to make muzzle effect for gun??

I'm trynna create a realistic muzzle effect, but when ever I shoot, I don't see any smoke. In fact, I don't even know if this is the most efficient way of doing this. Please help me, and if there are any better ways of doing muzzle effects, then please tell me as well. smoke script

local tool = script.Parent
local muzzel = script.Parent.Muzzel.Position
tool.Equipped:Connect(function(mouse)

    mouse.Button1Down:Connect(function()

        local beam = Instance.new("Smoke")
        beam.Parent = "Workspace"
        beam.CFrame = CFrame.new(tool.Muzzel.CFrame.p)

        end)
    end)