Firing a RemoteEvent that gives a gun to the player, but GetMouse() is not working?

Hello, i was just making one of those "FE script cloner things" and I got the gun to work but when i equip it, i get a error in the console saying: "ServerMain:532: attempt to index local 'Mouse' (a nil value)", is there any solution for this?

I had to cut the script because it was a long question.

local RemoteEvent = game:GetService("ReplicatedStorage"):WaitForChild("Bungy")



RemoteEvent.OnServerEvent:Connect(function(player) -- When the remote is fired, put your code below!



local Scale = player.Character.Torso.Size.X/2*(player.Character.Torso:FindFirstChild("ScaleInserted") ~= nil and player.Character.Torso:FindFirstChild("ScaleInserted").Scale.Z or 1)*0.8
local Speed = 20*Scale
local Gravity = 0.1

local Player = player
local Character = Player.Character
local Humanoid = Character.Humanoid
Humanoid:SetStateEnabled(Enum.HumanoidStateType.Ragdoll,false)
local Torso = Character.HumanoidRootPart
local Mouse = player:GetMouse()
local RenderStepped = game:GetService("RunService").RenderStepped
local Camera = Workspace.CurrentCamera
Camera:ClearAllChildren()
local Model = Instance.new("Model",Character)
local IgnoreList = {Character,Workspace.Terrain}

local Part0Joint = CFrame.new(Vector3.new(1,0.75,0)*Scale*1.25)
local Part1Joint = CFrame.new(Vector3.new(-0.5,0.75,0)*Scale*1.25)
local RotationOffset = CFrame.Angles(math.rad(90),math.rad(0),0)
local Gangster = false

local Part0JointHead = CFrame.new(Vector3.new(0,1,0)*Scale*1.25)
local Part1JointHead = CFrame.new(Vector3.new(0,-0.5,0)*Scale*1.25)
local RotationOffsetHead = CFrame.Angles(0,0,0)

local Handle = Instance.new("Part",Model)
Handle.CanCollide = false
Handle.Name = "Handle"
Handle.Position = Vector3.new(0,100,0)
Handle:BreakJoints()
Handle.FormFactor = "Custom"
Handle.Size = Vector3.new(0.2,0.2,0.2)
Handle.TopSurface = "SmoothNoOutlines"
Handle.BottomSurface = "SmoothNoOutlines"
Handle.FrontSurface = "SmoothNoOutlines"
Handle.BackSurface = "SmoothNoOutlines"
Handle.RightSurface = "SmoothNoOutlines"
Handle.LeftSurface = "SmoothNoOutlines"
Handle.BrickColor = BrickColor.new("Black")
local Mesh = Instance.new("BlockMesh",Handle)
Mesh.Scale = Vector3.new(0.25,1,0.4) / 0.2 * Scale
local HandleWeld = Instance.new("Motor6D")
HandleWeld.Part0 = Character["Right Arm"]
HandleWeld.Part1 = Handle
HandleWeld.C0 = CFrame.new(Vector3.new(0,-1,0)*Scale) * CFrame.Angles(math.rad(-105),0,0)
HandleWeld.Parent = Handle

local Part = Instance.new("Part",Model)
Part.CanCollide = false
Part.Position = Vector3.new(0,100,0)
Part:BreakJoints()
Part.FormFactor = "Custom"
Part.Size = Vector3.new(0.2,0.2,0.2)
Part.TopSurface = "SmoothNoOutlines"
Part.BottomSurface = "SmoothNoOutlines"
Part.FrontSurface = "SmoothNoOutlines"
Part.BackSurface = "SmoothNoOutlines"
Part.RightSurface = "SmoothNoOutlines"
Part.LeftSurface = "SmoothNoOutlines"
Part.BrickColor = BrickColor.new("Black")
local Mesh = Instance.new("CylinderMesh",Part)
Mesh.Scale = Vector3.new(0.07,0.2,0.07) / 0.2 * Scale
local PartWeld = Instance.new("Motor6D")
PartWeld.Part0 = Handle
PartWeld.Part1 = Part
PartWeld.C0 = CFrame.new(Vector3.new(-0.115,-0.475,-0.190)*Scale) * CFrame.Angles(0,0,0)
PartWeld.Parent = Part

local Part = Instance.new("Part",Model)
Part.CanCollide = false
Part.Position = Vector3.new(0,100,0)
Part:BreakJoints()
Part.FormFactor = "Custom"
Part.Size = Vector3.new(0.2,0.2,0.2)
Part.TopSurface = "SmoothNoOutlines"
Part.BottomSurface = "SmoothNoOutlines"
Part.FrontSurface = "SmoothNoOutlines"
Part.BackSurface = "SmoothNoOutlines"
Part.RightSurface = "SmoothNoOutlines"