This ADS is working briefly?

Can someone point me in the right direction to do this?

First Open Localscript then put the Localscript into the Weapon. (Heres the Script)

wait()
Tool=script.Parent
CP,Torso,g=nil,nil,nil
necko=CFrame.new(0, 1, 0, -1, -0, -0, 0, 0, 1, 0, 1, 0)
getPos=function(Pos,TorsoPos)
	return Vector3.new(Pos.x,TorsoPos.y,Pos.z)
end
Turn=function(mouse,Torso,Gyro)
	g.cframe=CFrame.new(Torso.Position,getPos(mouse.Hit.p,Torso.Position))
	offset=(Torso.Position.y-mouse.Hit.p.y)/100
	mag=(Torso.Position-mouse.Hit.p).magnitude/80
	offset=offset/mag
	neck=Torso.Neck
	neck.C0=necko*CFrame.fromEulerAnglesXYZ(offset,0,0)
	arm=Torso:FindFirstChild("Right Shoulder")
	if arm~=nil then
		arm.C0=CFrame.new(1, 0.5, 0, 0, 0, 1, -6.48200512e-007, 1.00000274, 0, -1.00000274, -6.48200512e-007, 0)*CFrame.fromEulerAnglesXYZ(0,0,-offset)
	end
end
Equi=function(mouse)
	wait(.2)	
	CP=Tool.Parent
	Torso=CP.Torso
	g=Instance.new("BodyGyro")
	g.P=18000
	g.D=600
	g.maxTorque=Vector3.new(80000,80000000,80000)*50000000000000000000000000
	g.cframe=Torso.CFrame
	g.Parent=Torso
	while true do
		if Tool.Parent.className~="Model" then
			break
		end
		Turn(mouse,Torso,g)
		wait()
	end
	Torso.Neck.C0=necko
	g:Remove()
end
Tool.Equipped:connect(Equi)