http://zelmanpartisans.com/?p=48#comments

[Defense Distributed's "Ghost Gun" box]

TRX
OCTOBER 6, 2014

Defense Distributed's little box is just a publicity stunt.

It's easy enough to "machine" an AR lower on your kitchen table with hand tools. Lots of people have done it. Here's one of several web pages: http://mujahadeenar15a2.tripod.com/

You can use pieces of sheet metal and screws: http://www.guns.com/2013/12/06/bolt-together-ar-15-lower-receiver-3d-printer-necessary/

In fact, since the AR receiver is just a bracket for holding things together, it doesn't have to be a 7075 aluminum forging. It doesn't even have to be metal.

Here's one from Weaponeer.com, carved from a pine board: http://www.weaponeer.net/forum/forum_posts.asp?TID=8035&TPN=2

(his first version used pieces of plastic kitchen cutting boards)

Another scratch build, formed and welded steel parts: http://www.homegunsmith.com/cgi-bin/ib3/ikonboard.cgi?act=ST;f=30;t=11628

If you have a welder, you can tack together a laser-cut set of interlocking puzzle pieces: http://www.theflatspot.net/ar-15-receiver-flat.html

gunmold.com used to sell a "pour it yourself" jello mold and two-part plastic kit to make an AR receiver; the ATF shut them down temporarily.

You already have a CNC mill, like my little Seig X2 that I bought new and added CNC for less than DD's little hobby-grade CNC router? Just download the CNC code: http://www.cncguns.com/forum/index.php

Then, of course, there are the REAL parts you need to assemble the rifle - things the little DD box is never going to be able to make. The lower on an AR is relevant only because it's the part the ATF requires the serial number to be on. DD's box is like carving some new grips for your 1911 with your pocket knife, and then claiming "I built a 1911!"


Since I posted this, Boris has come up with his "Fruity Ghost" method of making plastic castings for AR receivers: http://www.ar15.com/forums/t_3_4/676733_Fruity_Ghost___DIY_100s_of_ARs_cheaper__faster__gentler_.html