This gun script would not make the gun shoot, it broke from ROBLOX updates. How do I fix it?

This script of the pistol broke, so basically the weld of this pistol is broken and it does not shoot.

It broke because of ROBLOX updates but I don't know how to fix it.

Can any of you help? Thank you!

Here it is:

local pellet = Instance.new("Part")

pellet.Name = "Bullet"

pellet.Shape = 0

--pellet.Transparency = 0.3

pellet.BrickColor = BrickColor.new("Bright yellow")

pellet.Size = Vector3.new(1,1,1)

pellet.CanCollide = false

local reloadSound = Instance.new("Sound")

reloadSound.SoundId = "http://www.roblox.com/asset/?id=2920960"

reloadSound.Parent = script.Parent

reloadSound.Volume = .5

local fireSound = Instance.new("Sound")

fireSound.SoundId = "http://www.roblox.com/asset/?id=2760979"

fireSound.Parent = script.Parent

fireSound.Volume = .5

--player

player = nil

--save shoulders

RSH, LSH = nil, nil

--grip

GRP = nil

--welds

RW, LW = Instance.new("Weld"), Instance.new("Weld")

--what anim

anim = "none"

--onselected, save shoulders and get player

script.Parent.Equipped:connect(function()

script.Parent.Name = "["..script.Parent.Ammo.Value.."]["..script.Parent.Clips.Value.."]"

player = game.Players:playerFromCharacter(script.Parent.Parent)

local ch = script.Parent.Parent

RSH = ch.Torso["Right Shoulder"]

LSH = ch.Torso["Left Shoulder"]

GRP = ch["Right Arm"].RightGrip

--

RSH.Parent = nil

LSH.Parent = nil

--

RW.Part0 = ch.Torso

RW.C0 = CFrame.new(1.5, 0.5, 0) --* CFrame.fromEulerAnglesXYZ(1.3, 0, -0.5)

RW.C1 = CFrame.new(0, 0.5, 0)

RW.Part1 = ch["Right Arm"]

RW.Parent = ch.Torso

_G.R = RW

--

LW.Part0 = ch.Torso

LW.C0 = CFrame.new(-1.5, 0.5, 0) --* CFrame.fromEulerAnglesXYZ(1.7, 0, 0.8)

LW.C1 = CFrame.new(0, 0.5, 0)

LW.Part1 = ch["Left Arm"]

LW.Parent = ch.Torso

_G.L = LW

--

GRP.C0 = CFrame.new(-0.25, -1, -0.2) * CFrame.fromEulerAnglesXYZ(-1.577, -0.6, 0)

--Bring_Arm_Up animation

for i = 0, 1, 0.05 do

wait()

RW.C0 = CFrame.new(1, 0.5, -0.5) * CFrame.fromEulerAnglesXYZ(1.62, 0, -0.6)

LW.C0 = CFrame.new(-1, 0.5, -0.5) * CFrame.fromEulerAnglesXYZ(1.62, 0, 0.6)

--LW.C1 = CFrame.new(-0.3i, 0.5+1.2i, 0)

end

end)

script.Parent.Unequipped:connect(function()

script.Parent.Name = "Pistol"

--Bring_Arm_Down animation

RSH.Parent = player.Character.Torso

LSH.Parent = player.Character.Torso

RW.Parent = nil

LW.Parent = nil

end)

function Reload()

if (script.Parent.Clips.Value~=0) and (script.Parent.Ammo.Value<=7) then

--start homerunhit connection--

--local con = script.Parent.Handle.Touched:connect(HomeRunHit)

---

--[[for i = 0, 1, 0.2 do

wait()

LW.C0 = CFrame.new(-1.5, 0.5, 0) * CFrame.fromEulerAnglesXYZ(1.62, 0, 0.8+0.6*i)

end]]

wait(0.5)

---

script.Parent.Ammo.Value = 8

script.Parent.Clips.Value =script.Parent.Clips.Value - 1

reloadSound:play()

end

end

function Fire()

if (script.Parent.Ammo.Value~=0) then

fireSound:play()

script.Parent.Ammo.Value =script.Parent.Ammo.Value - 1

local b = pellet:Clone()

b.Parent = workspace

local target = script.Parent.Parent.Humanoid.TargetPoint - script.Parent.Handle.Position

local dir = computeDirection(target)

local pos = script.Parent.Handle.Position + (dir * 5)

local bcframe = CFrame.new(pos, pos + dir)

local foirc = bcframe * CFrame.fromEulerAnglesXYZ(math.random(0,50) / 3000, math.random(-50,50) / 3000,0)

b.CFrame = foirc

local bv = Instance.new("BodyVelocity")

bv.maxForce = Vector3.new(1e+009,1e+009,1e+009)

bv.velocity = foirc.lookVector * 150

bv.Parent = b

local s = script.Parent.BulletHit:clone()

s.Disabled = false

s.Parent = b

end

end

function computeDirection(pos)

local invrtDir = 1 / math.sqrt((pos.magnitude * pos.magnitude))

local dir = Vector3.new(pos.x * invrtDir, pos.y * invrtDir, pos.z * invrtDir)

return dir

end

local lastclick = false

script.Parent.MouseClick.Changed:connect(function()

if (lastclick == false) then

lastclick = true

anim = "norm"

last_click = time()

Fire()

wait(0.1)

lastclick = false

end

end)

local lastkey = false

script.Parent.KeyClick.Changed:connect(function()

if (lastkey == false) then

lastkey = true

anim = "reload"

last_click = time()

Reload()

wait(0.5)

lastkey = false

end

end)

script.Parent.Ammo.Changed:connect(function()

script.Parent.Name = "["..script.Parent.Ammo.Value.."]["..script.Parent.Clips.Value.."]"

end)

script.Parent.Clips.Changed:connect(function()

script.Parent.Name = "["..script.Parent.Ammo.Value.."]["..script.Parent.Clips.Value.."]"

end)