To the best of my knowledge, surplus O3's were purchased by foreign countries and re-barreled to their standard military cartridges. My knowledge comes from what I have read and my books pertaining to such information are limited. If this is true, what countries purchased these rifles and performed such conversions and to what calibers and how would these rifles be marked?
I would appreciate any information pertaining to this. I cannot say for sure that this is true but I have read that it did from at least one author.
Mashburn
David a. Cogburn