There are several misconceptions on full auto firearms. First,you cannot legally purchase the receiver of a machinegun (whichincludes the lower of an M16) and walk out the door of the gunshop.Only the dealers that are licensed as machinegun dealers can sellone, and only those lowers that have ALREADY been registered by May1986 CAN be transferred to a private citizen. You will need toapply to the ATF for a transfer of the firearm, pay a $200 transfertax, and several months later (if all goes well) get your transferdocument with the stamp from the ATF. The dealer can THEN releasethe lower to you. BTW, the current selling price for a LEGALtransferrable M16 is about $26,000.