There is a MAJOR problem with "Making a machinegun". Law passed in May 1986- only those full autos ALREADY REGISTERED with the BATF can be transferred to a civilian, and no more can be made. IF you have a pre-1986 registered SEAR, it can be used to convert an AR to full- along with the other parts you will need. However, this law put he price of LEGAL full auto's thru the roof- about $16,000 for a LEGAL, TRANSFERABLE M-16. (No, that was not a typo- sixteen thousand dollars) BTW, the fee is a transfer tax- Feds get $200, transfer is thru a Class III dealer only (in your state of residence) There are then limts on where you can take it, etc. If you really want one, wait until you move, then go find a Class III dealer in your new state, and get your checkbook out. No whimpering, please.