Thanks for the help. I dabble in 1903's and the info in those books on 1922's left questions as to the M2's origin.

Rifle is currently in layaway awaiting my bonus to go pick up. Have other 22 trainers but a 1922 was not in the stable. Looks as this will be a nice addition.
An fyi the front sight is one piece, did not show well in pics, possibly a 17 AXF you noted.
Did not think to look at bolt for a SN but there was no headspace adjustment on the lug.

Thanks again
Leggett