Am I missing something, or are all those delightful AR-15 .223 pistol kits advertised in Shotgun News illegal to use? I _really_ wanted to build one (first crack at building a gun, might as well do something simple and amusing), but the AW ban totally blocked it as far as I could see. Only hope was to get a lower reciever that is legally proven to have been part of such a configuration at one point, and those receivers ran about 5 times what they should cost.
(FWIW, I gave up on that and got a Class III 12-guage pistol.)