Google McCann Industries in Spanaway Washington. They made these a few years ago, not sure of they still do.
I checked their web site and it doesn't look like they do.
I'm surprised that somebody has come up with something like this from scratch. I would imagine any patents on the M-1 have expired by now. I can see a M-1 type action with a detachable 8-round magazine as a dangerous game rifle.
