This rifle was not upgraded and is still in it's M1922M1 configuration. It has an "I" instead of a "1" after the M1922M. I am familiar with the fact that most of the M1icon variants were converted to M2. This one somehow escaped. It has no letter "B" added to its serial number. The father purchased a 1911 from the NRA and this rifle may have been purchased around the same time.

Bill