Springfield Armory (TM) made some M1s, but not completely from scratch. It is a very expensive design to produce.
I'm not an engineer so I don't know but is the M-14 that much different from the M-1? I used both in the service extensively and broke them down and I didn't notice any real difference but as I said I'm no engineer.
i have heard the m14 often refered to as the son of the garand, which is correct, but it is different. It uses a magazine the garand a clip. Gas system is different too.
the production garand was 30.06, the m14 7.62x51
