The gun i made only works in studio and ive put it in both a script and localscript an they both work, but not in the server test.

local tool = script.Parent
local player = game:GetService("Players").LocalPlayer
local Ammo = script.Parent:WaitForChild("Ammo")
HoldAnimation = script.Parent.HoldAnim
tool.Equipped:connect(function(mouse)
	print("Tool equipped!")
 
	mouse.Button1Down:connect(function()
		if Ammo.Value >= 1 then
		print("Mouse pressed!")
		Ammo.Value = Ammo.Value - 1
		print(Ammo.Value)
		script.Parent.Handle.Fire:Play()
		local ray = Ray.new(tool.Handle.CFrame.p, (mouse.Hit.p - tool.Handle.CFrame.p).unit * 300)
		local part, position = workspace:FindPartOnRay(ray, player.Character, false, true)
 
		local beam = Instance.new("Part", workspace)
		beam.BrickColor = BrickColor.new("Bright red")
		beam.FormFactor = "Custom"
		beam.Material = "Neon"
		beam.Transparency = 0.5
		beam.Anchored = true
		beam.Locked = true
		beam.CanCollide = false
 
		local distance = (tool.Handle.CFrame.p - position).magnitude
		beam.Size = Vector3.new(0.3, 0.3, distance)
		beam.CFrame = CFrame.new(tool.Handle.CFrame.p, position) * CFrame.new(0, 0, -distance / 2)
		
 
		game:GetService("Debris"):AddItem(beam, 0.1)
		
		if part then
			local humanoid = part.Parent:FindFirstChild("Humanoid")
 
			if not humanoid then
				humanoid = part.Parent.Parent:FindFirstChild("Humanoid")
			end
 
			if humanoid then
				humanoid:TakeDamage(10)
				
			end
		end
		end
		end)
end)

local Player = game.Players.LocalPlayer
local action_reload = false
Mouse = Player:GetMouse()

Mouse.KeyDown:connect(function(Key)
	if(Key:lower() == "r") and Ammo.Value < 7 and action_reload == false then
		action_reload = true
		script.Parent.Handle.Reload:Play()
		wait(2)
		Ammo.Value = 7
		print(Ammo.Value)
		action_reload = false
	end
end)