Creating a Part and Moving It to a Mouse Position?

I'm trying to make that if you click R it creates a part. I have no errors and it creates a part but it doesn't position it right. When I click R when my mouse is in another direction it makes the position different but it doesn't work like always :P

Local Script (Inside StarterGui):

local UIS = game:GetService("UserInputService")
local target = game.Players.LocalPlayer:GetMouse().Hit

function onKeyPress(inputObject, gameProcessedEvent)
	if inputObject.KeyCode == Enum.KeyCode.R then
		local Part = Instance.new("Part", workspace)
		Part.Size = Vector3.new(4, 1, 2)
		Part.Anchored = true
		
		local x = target.X
		local y = target.Y
		local z = target.Z
		
		Part.Position = Vector3.new(x, y, z)
	end
end
 
UIS.InputBegan:Connect(onKeyPress)

I would really appreciate it if you will help me with my problem, Plus I'll accept your answer if it worked.

Thanks, MajinBluee