New 1903A3 - Can anyone with more knowledge tell me more about this example?

[m1903rifle]

There is a great deal of difference.... the "scant" has part of a pistol grip while the straight stock is without any part of a pistol grip, i.e. it is straight on the bottom. The difference is very easy to see if they are pictured side by side. See here for pictures of the various types:

http://www.vishooter.net/m1903/1903_stockpic.jpg