Why is my gun not reloading properly or damaging anything?

There are a couple of things wrong with my gun. First, it does not reload when it reaches 0 ammunition. Second, it doesn't damage anything with a humanoid. Here are the scripts:

Client-Side:

--Global Variables
local shotgun = script.Parent.Parent
local player = game.Players.LocalPlayer
local mouse = player:GetMouse()
local flare = shotgun:WaitForChild("Flare")
local handle = shotgun:WaitForChild("Handle")
local ContextActionService = game:GetService("ContextActionService")
local mouseDown = false
local equipped = false

--Folders
local animations = shotgun:WaitForChild("Animations")
local configurations = shotgun:WaitForChild("Configurations")
local remoteEvents = shotgun:WaitForChild("RemoteEvents")

--Animations
local reload = animations:WaitForChild("ReloadGun")
local fire = animations:WaitForChild("FireGun")
local hold = animations:WaitForChild("HoldGun")

--Animation Tracks
local reloadTrack
local fireTrack
local holdTrack

--Configurations
local range = configurations:WaitForChild("FireRange")
local allowTracing = configurations:WaitForChild("AllowTracing")
local ammo = configurations:WaitForChild("Ammo")

--Remote Events
local OnFire = remoteEvents:WaitForChild("OnFire")
local OnHit = remoteEvents:WaitForChild("OnHit")
local OnReload = remoteEvents:WaitForChild("OnReload")

--Remote functions
local AbleToReload = remoteEvents:WaitForChild("AbleToReload")
local AbleToShoot = remoteEvents:WaitForChild("AbleToShoot")

--Other Stuff
local sparkGui = shotgun.Flare:WaitForChild("SparkGui")

--Now we get to the other part of this. The functions.

local function equipGun()
	equipped = true
	
	local character = player.Character or player.CharacterAdded:Wait()
	local humanoid = character:WaitForChild("Humanoid")
	
	if humanoid then
		pcall(function()
			holdTrack = humanoid:LoadAnimation(hold)
			holdTrack:Play()
		end)
		
		pcall(function()
			reloadTrack = humanoid:LoadAnimation(reload)
		end)
		
		pcall(function()
			fireTrack = humanoid:LoadAnimation(fire)
		end)
	end
end

local function unequipGun()
	equipped = false
	
	if holdTrack then
		holdTrack:Stop()
	elseif reloadTrack then
		reloadTrack:Stop()
	elseif fireTrack then
		fireTrack:Stop()
	end
end

local function reloadGun()
	if AbleToReload:InvokeServer() then
		
		OnReload:FireServer()
		
		if reloadTrack then
			reloadTrack:Play()
		end
	end
end

local function fireGun()
	if AbleToShoot:InvokeServer() then
		if fireTrack then
			fireTrack:Play()
		end
	end
	
	if ammo.Value > 0 then
		sparkGui.Enabled = true
			
		local ray = Ray.new(flare.CFrame.p, (mouse.hit.p - flare.CFrame.p).unit * range.Value)
		local touch, position = workspace:FindPartOnRay(ray, player.Character)
			
		if touch then
			OnHit:FireServer(touch)
		end
		OnFire:FireServer()
			
		if allowTracing.Value then
			local bullet = Instance.new("Part")
			bullet.Anchored = bullet
			bullet.CanCollide = false
			bullet.Transparency = 0.8
			bullet.BrickColor = BrickColor.White()
			bullet.Material = Enum.Material.SmoothPlastic
				
			local distance = (flare.CFrame.p - position).magnitude
			bullet.Size = Vector3.new(0, 0, distance)
			bullet.CFrame = CFrame.new(flare.CFrame.p, position) * CFrame.new(0, 0, -distance/2)
			bullet.Parent = workspace
			
			game:GetService("Debris"):AddItem(bullet, 0.1)
			
			wait(0.1)
			
			sparkGui.Enabled = false
		end
	end
end

shotgun.Equipped:Connect(function()
	equipGun()
	
	mouse.Button1Up:Connect(function()
		mouseDown = false
	end)
		
	shotgun.Activated:Connect(function()
		mouseDown = true
		fireGun()
	end)
	
	ContextActionService:BindAction("Reload", reloadGun, false, Enum.KeyCode.R)
end)

shotgun.Unequipped:Connect(unequipGun)

Server-Side:

--Global Variables
local player
local shotgun = script.Parent.Parent
local handle = shotgun:WaitForChild("Handle")
local equipped = false
local reloading = false
local couldShoot = true

--Folders
local configurations = shotgun:WaitForChild("Configurations")
local remoteEvents = shotgun:WaitForChild("RemoteEvents")

--Configurations
local ammo = configurations:WaitForChild("Ammo")
local magSize = configurations:WaitForChild("MagSize")
local fireRate = configurations:WaitForChild("FireRate")
local damage = configurations:WaitForChild("Damage")
local headShotMultiplier = configurations:WaitForChild("HeadShotMultiplier")
local range = configurations:WaitForChild("FireRange")
local reloadTime = configurations:WaitForChild("ReloadTime")

--Remote Events
local onFire = remoteEvents:WaitForChild("OnFire")
local onHit = remoteEvents:WaitForChild("OnHit")
local onReload = remoteEvents:WaitForChild("OnReload")
local canFire = remoteEvents:WaitForChild("AbleToReload")
local canReload = remoteEvents:WaitForChild("AbleToShoot")

--Sounds
local emptySound = handle:WaitForChild("Empty")
local reloadSound = handle:WaitForChild("Reloading")
local fireSound = handle:WaitForChild("FireShots")

local function ableToReload(plr)
	if ammo.Value < magSize.Value then
		if not reloading then
			if equipped then
				return true
			end
		end
	end
	
	return false
end

local function reload(plr)
	if not ableToReload() then return end
	
	couldShoot = false
	reloading = true
	reloadSound:Play()
	wait(2)
	
	ammo.Value = magSize.Value

	reloading = false
	couldShoot = true
end

local function canShoot(plr, sound)
	if not reloading then
		if equipped then
			if ammo.Value > 0 then
				return true
			else
				if sound then
					sound:Play()
				end
				return false
			end
		end
	end
end

local function shoot()
	if not canShoot() then return end
	if couldShoot then
		fireSound:Play()
		
		ammo.Value = ammo.Value - 1
	end
end

local function hit(plr, part)
	if not canShoot() then return end
	if not part then return end
	
	local character = plr.Character or plr.CharacterAdded:Wait()
	local rootPart = character:WaitForChild("HumanoidRootPart")
	
	if (rootPart.CFrame.p - part.CFrame.p).magnitude <= range.Value then
		local humanoid
		local newDamage
		
		humanoid = part.Parent:FindFirstChild("Humanoid")
		
		if humanoid then
			newDamage = damage.Value
			
			if part.Name == "Head" then
				newDamage = damage.Value * headShotMultiplier.Value
			end
			
			humanoid:TakeDamage(newDamage)
		end
	end
end

local function equip()
	equipped = true
	player = game:GetService("Players"):GetPlayerFromCharacter(shotgun.Parent.Parent)
end

local function unequip()
	equipped = false
end

shotgun.Equipped:Connect(equip)
shotgun.Unequipped:Connect(unequip)
onHit.OnServerEvent:Connect(hit)
onFire.OnServerEvent:Connect(shoot)
onReload.OnServerEvent:Connect(reload)
canFire.OnServerInvoke = canShoot
canReload.OnServerInvoke = ableToReload

So basically, my gun is not reloading when it's at no ammunition, and it's not dealing damage to anything with a humanoid. Why is it doing that?