How would I make this Raycast gun shoot in the air?

So I made this gun script. It works, but only when I point my mouse to a surface and shoot. I want it to shoot when it points to the sky also.

The script:

tool.Activated:Connect(function()
	firing = true
	while firing == true do
		local ray = Ray.new(script.Parent.barrelpos1.Position, (mouse.Hit.p - script.Parent.barrelpos1.Position).Unit * 100)
		local raypart, position = game.Workspace:FindPartOnRayWithIgnoreList(ray, {char}, false, true)
		
		local Dist = (mouse.Hit.p - script.Parent.barrelpos1.Position).magnitude
		
		local Lazer = Instance.new("Part")
 		Lazer.Parent = game.Workspace
		Lazer.Anchored = true
	 	Lazer.CanCollide = false
 		Lazer.Size = Vector3.new(0.1, 0.1, Dist)
		Lazer.CFrame = CFrame.new(script.Parent.barrelpos1.Position,mouse.Hit.p + Vector3.new(math.random(1,3),math.random(1,3),math.random(1,3))) * CFrame.new(0, 0, -Dist/2)
		debris:AddItem(Lazer, 0.1)
		wait(0.3)
	end
end)

Any help would be appreciated.

Try replacing mouse.Hit.p in line 07 with position from line 05. Because when the mouse is pointing towards the sky, there is no mouse.Hit, but there may very well still be a position since the ray will always have an end, even if there is no target.

tool.Activated:Connect(function()
    firing = true
    while firing == true do
        local ray = Ray.new(script.Parent.barrelpos1.Position, (mouse.Hit.p - script.Parent.barrelpos1.Position).Unit * 100)
        local raypart, position = game.Workspace:FindPartOnRayWithIgnoreList(ray, {char}, false, true)

        local Dist = (position - script.Parent.barrelpos1.Position).magnitude

        local Lazer = Instance.new("Part")
        Lazer.Parent = game.Workspace
        Lazer.Anchored = true
        Lazer.CanCollide = false
        Lazer.Size = Vector3.new(0.1, 0.1, Dist)
        Lazer.CFrame = CFrame.new(script.Parent.barrelpos1.Position,mouse.Hit.p + Vector3.new(math.random(1,3),math.random(1,3),math.random(1,3))) * CFrame.new(0, 0, -Dist/2)
        debris:AddItem(Lazer, 0.1)
        wait(0.3)
    end
end)