This is a "$90 at your local yard sale" drill press:
This $125 item is, "Our complete jig for completing the machining of a Tactical Machining 80% AR-15 lower receiver":
This IS A GUN; an AR 15 Lower, it has a serial number and must be shipped to an FFL dealer:
This is an 80% Lower, it is NOT A GUN; a 'non FFL item",
you can buy it on the net with a money order and have it shipped to a PO BOX.
Without licence, you can manufacture and $ELL 80's
on the net or off your front porch unrestricted.
Its a shipped-to-your-door $80-$180, buy in bulk if you like; no background check transaction:
In the eyes of the law, its just a novelty, a paper weight; a chunk of aluminium.
This too is a non-FFL purchase:
Waiting lists are currently about 3 month$ out on all 80% lowers;
www.ar15.com is a great place to keep up on that;
30 days old and 100 pages long:
THE "IN STOCK" LOWER RECEIVER THREAD
This is the .gov resource which re-affirms your God given right to build your own personal firearm.