[Okieshooter]

Actually you can buy one of these and build your own AR-15 without a FFL background check.

http://www.tacticalmachining.com/80-ar-15-lower-receiver.html

[MrB]

People should look into “maker spaces” or “hacker spaces”.

http://makerspace.com/makerspace-directory

They are community places where you can use the machines to build whatever you want. Memberships vary but are reasonable.