How can I make my non raycast gun FE?

I am a beginner scripter and through experimentation I have made a non raycast gun that teleports a damage brick over to my mouse position when I click, and disappears almost instantly. However, I do not know how to work with FE, so my gun is broken wherever I want to use it. How can I convert my gun to FE? I will put the code below if it helps.

(Gun script)

local tool = script.Parent
local player = game:GetService("Players").LocalPlayer
local mouse = player:GetMouse()
local ammo = 12
local mag = 12
local reload = false
tool.Equipped:connect(function(mouse)


 mouse.Button1Down:connect(function()
    if ammo > 0 and reload == false then
    tool.SlideBack.Transparency = 0
        tool.Slide.Transparency = 1
        tool.FireSound.TimePosition = 0
        tool.FireSound.Playing = true
    local oof = game.ServerStorage.Oofpart:Clone()
    oof.BrickColor = BrickColor.Black()
    oof.Size = Vector3.new(0.7,0.7,0.7)
    oof.Position = mouse.Hit.p
    oof.Transparency = 0
    oof.Anchored = true
    oof.CanCollide = false
    oof.Parent = workspace
    game:GetService("Debris"):AddItem(oof, 0.001)
    wait(0.05)
    tool.SlideBack.Transparency = 1
        tool.Slide.Transparency = 0
    end

end)
end)

(Damage brick script)

function onTouched(part)
 local h = part.Parent:findFirstChild("Humanoid")
 if h~=nil then 
  h.Health = h.Health - 27
script.Parent:Destroy()
 end
end

script.Parent.Touched:connect(onTouched)

I know, the code is sloppy and inefficient, but it's my first gun. I have almost no experience with building stuff like this.