Comment Re:not that interesting or new (Score 2) 289
AR-15 lower receivers are not, and have never been made as a stamped part (expect maybe a few mad scientists making one-of-a-kind prototypes). Neither does the AK-47 (a real one that is, they used milled receivers). The guns that 99% of people call AK-47s are actually variants of the AKM, a cheapier replacement for the AK-47, which uses a stamped receiver.
I would have posted as an AC too if making such an uninformed statement. Google "M16 stamped receiver". You will be enlightened. Both the M16 and AK-47 were designed to have, and regularly produced with, stamped receivers. And before you argue the M16 and AR-15 are not the same thing, you should Google that too and make yourself even more familiar with the Stoner design.
The Wikipedia reference might be a good place for you to start. It will be on the first page of your Google search.