Grenade script not working. Anybody help?

Basically, when you press the right mouse button, your character will throw a grenade from his torso. But. the script isn't working. Can anyone fix it?

function onButton2Down(m)
local Grenade = Instance.new.Part
Grenade.FormFactor = 0
Grenade.Reflectance = 0
Grenade.Transperancy = 0
Grenade.Size = 1,1,1
Grenade.Locked = true
Grenade.CanCollide = true
Grenade.Position = Owner.Torso
end


local Mesh = Instance.new.SpecialMesh
local Special Mesh = GMesh
GMesh.MeshId = "http://www.roblox.com/Asset/?id=10207236"
GMesh.Parent = Grenade

local Explode = Instance.new.Explosion
local Explosion = Ex
Ex.BlastRadius = 5
Ex.BlastPressure = 5000
Ex.ExplosionType = Nocraters
Sound1.Play()

local Sound = Instance.New.Sound
local Sound = Sound1
Sound1.Play = false
Sound1.Enabled = true