I'm having issues with a basic reload system value change, please help?

I'm trying to make a simple reload system

So basically what happens is in my main raycast script every time the person clicks to make a raycast it take the value of ammo and subtracts 1 so all that works fine but then I'm running into a issue in another script that is supposed to change the value of ammo back to 10 when it runs out

if script.Parent.Ammo.Value<=0 then
	script.Parent.Ammo.Value=10
end

Here is the main script if you need it:

tool = script.Parent
playerMouse=game.Players.LocalPlayer:GetMouse()
player=game.Players.LocalPlayer

tool.Equipped:connect(function(mouse)
	mouse.Icon="http://www.roblox.com/asset/?id=36983768"
	mouse.Button1Down:connect(function()
		script.Parent.Ammo.Value=script.Parent.Ammo.Value-1
		if script.Parent.Ammo.Value>=1 then
		local ray = Ray.new(tool.Handle.CFrame.p, (mouse.Hit.p - tool.Handle.CFrame.p).unit * 300)
		local part, position = workspace:FindPartOnRay(ray, player.Character, false, true)
 
		local beam = Instance.new("Part", workspace)
		beam.BrickColor = BrickColor.new("Bright red")
		beam.FormFactor = "Custom"
		beam.Material = "Neon"
		beam.Transparency = 0.25
		beam.Anchored = true
		beam.Locked = true
		beam.CanCollide = false
 
		local distance = (tool.Handle.CFrame.p - position).magnitude
		beam.Size = Vector3.new(0.3, 0.3, distance)
		beam.CFrame = CFrame.new(tool.Handle.CFrame.p, position) * CFrame.new(0, 0, -distance / 2)
 
		game:GetService("Debris"):AddItem(beam, 0.1)
 
		if part then
			local humanoid = part.Parent:FindFirstChild("Humanoid")
 
			if not humanoid then
				humanoid = part.Parent.Parent:FindFirstChild("Humanoid")
			end
 
			if humanoid then
				humanoid:TakeDamage(1.5)
					
				end
			end
		end
	end)
end)

I don't know because you only posted three lines, but it doesn't look like there's a Changed event there. You need to check every time the value changes; as it is now, it only checks once.

script.Parent.Ammo.Changed:connect(function()
	if script.Parent.Ammo.Value<=0 then
		script.Parent.Ammo.Value=10
	end
end)

Hope this helped.