1st. i hope im in the right spot.

2nd. i am looking for a cheap desktop milling machine for aluminum that can make detailed small parts. like a ar15 lower reciever. rifle bolt. sights and other parts.bassicaly anything up to say...6inch thick by 12-18inches square. and the cheaper the better. i am looking for a maching i can hook to a computer. load a file and walk away. then when i come back its done....not that ill walk away but you get the idea. i am looking at around 500? any help is great ty.