Why my game crash when i try to equip or pick up this tool?

local tool = script.Parent


local equipado = false
local maxammo = 50
local MouseD = false

	
tool.Equipped:connect(function(equipar)
	
	equipado = true
	char = tool.Parent
	player = game.Players:GetPlayerFromCharacter(char)
	equipar.Icon = "http://www.roblox.com/asset/?id=79658449"
	
	gui = tool.GUI:Clone()
	gui.Parent = player.PlayerGui
	
end)


function reload()
	if tool.ammo.Value ~= 50 and tool.ammo.Value <50 then
		wait(2)
		tool.ReloadSound:play()
		tool.ammo.Value = 50

	end
end


equipar.KeyDown:connect(function(key)
key = key:lower()
if key == "r" then
	reload()	
	end	
end)

-- Disparando

equipar.Button1Up:connect(function()
	MouseD = false
end)

equipar.Button1Down:connect(function()
	MouseD = true
	if script.Parent.ammo >0 then
		tool.FireSound:play()
	tool.ammo.Value = tool.ammo.Value - 1
	
	
	tool.Flash.PointLight.Brightness = 5
	tool.Flash.Transparency = 0
	
	bala = Instance.new("Part")
	bala.Parent = Workspace
	bala.BrickColor = BrickColor.new("Cool yellow")
	bala.Size = Vector3.new(1,1,1)
	bala.Name = B
	remover = script.Parent.remover:Clone()
	remover.Parent = bala
	
	balaM = Instance.new("SpecialMesh")
    balaM.MeshType = "Sphere"
	balaM.Parent = bala
	balaM.Scale = Vector3.new(0.2,0.2,0.2)
	
	
	wait(0.05)
	tool.Flash.PointLight.Brightness = 0
	tool.Flash.Transparency = 1
	
	end
end)

Spanish scripter huh? Glad to see i'm not the only spanish scripter here.

--[[Line 59]] bala.Name = B

The script doesn't seem to show any value called "B" If these weren't your intentions, Use

bala.Name="B"

In the rest, I don't see anything wrong, except for the line 19, We don't know if it has a loop or anything in the Cloned Gui, but your script can be optimized.

But could really that line make your game crash? Are you sure you have any "While true do" loops in your game or tool?

Weld scripts have a small chance of crashing your game too.

Honestly having a while "true" do in the while loop is completely pointless, waste of code, many people do that.

A better way is using:

while wait() do 
print("Sup")
end
--[[If you're using the loop to update certain properties or values of an object, for performance reasons, it's suggested to use]]
while wait(1.5) do --Could be longer or shorter, you decide.
--ValueUpdate
end