Gents, This may already have been posted, however it is noteworthy enough for those who may not have seen it. This looks like vintage tests of the 1921A. I have seen stills from this. Great footage Enjoy! http://www.mrconservative.com/2014/06/42252-1920s-sub-machine-gun-commercial-would-drive-gun-grabbers-insane/ Semper Fi, Sandman1957