Note that it is not legal to transfer a receiver built like this to anyone else. You cannot sell or give it away, it is yours forever. You are still subject to

Note that it is not legal to transfer a receiver built like this to anyone else. You cannot sell or give it away, it is yours forever. You are still subject to your local laws, and cannot built a fully automatic weapon. You can also do this with AR-15 receivers, there used to be a couple of places that would sell you an 80% aluminum casting and you would finish the machining yourself. If you don't want to go to the trouble you can always buy a stripped lower receiver from a dealer (this is the part that carries the serial # and is considered the gun by the BATFE) and assemble the rest yourself. I wrote an article on this back in 2000 - http://www.brianlane.com/build-an-ar-15-rifle.html http://www.brianlane.com/build-an-ar-15-rifle.html