"make a working gun script and the Bullets is called Bullet and it is in ReplicatedStorage and the gun is a tool called Gun and what it will do is shoot bullet to where the mouse was clicked and it will do 20 damage make it so you can see the bullet fly to the target make it so the bullet will not damage the player who shoots the gun make this id the Crosshair 11719595129"

local ReplicatedStorage = game:GetService("ReplicatedStorage")
local Players = game:GetService("Players")
local Debris = game:GetService("Debris")

local Bullet = ReplicatedStorage:WaitForChild("Bullet")
local Gun = Instance.new("Tool")
Gun.Name = "Gun"

local crosshairID = "rbxassetid://11719595129"

local function onActivated()
    local player = Players.LocalPlayer
    local mouse = player:GetMouse()
    local character = player.Character
    local humanoid = character:FindFirstChild("Humanoid")
    
    if not character or not humanoid then return end
    
    local startPosition = character.PrimaryPart.Position
    local targetPosition = mouse.Hit.Position
    local direction = (targetPosition - startPosition).Unit
    local distance = (targetPosition - startPosition).Magnitude
    
    local bullet = Bullet:Clone()
    bullet.Position = startPosition
    bullet.Parent = workspace
    
    local bodyVelocity = Instance.new("BodyVelocity")
    bodyVelocity.MaxForce = Vector3.new(math.huge, math.huge, math.huge)
    bodyVelocity.Velocity = direction * 100
    bodyVelocity.Parent = bullet
    
    Debris:AddItem(bullet, 2)
    
    bullet.Touched:Connect(function(hit)
        local hitCharacter = hit.Parent
        local hitHumanoid = hitCharacter:FindFirstChild("Humanoid")
        
        if hitHumanoid and hitCharacter ~= character then
            hitHumanoid:TakeDamage(20)
        end
    end)
end

Gun.Activated:Connect(onActivated)

local function onCharacterAdded(character)
    Gun.Parent = character
    local playerGui = Players.LocalPlayer:WaitForChild("PlayerGui")
    local screenGui = Instance.new("ScreenGui")
    screenGui.Parent = playerGui
    local crosshair = Instance.new("ImageLabel")
    crosshair.Image = crosshairID
    crosshair.Size = UDim2.new(0, 32, 0, 32)
    crosshair.AnchorPoint = Vector2.new(0.5, 0.5)
    crosshair.BackgroundTransparency = 1
    crosshair.Position = UDim2.new(0.5, 0, 0.5, 0)
    crosshair.Parent = screenGui
end

Players.LocalPlayer.CharacterAdded:Connect(onCharacterAdded)