There was a lot of stuff "liberated" by WW II GIs. Also, there has been a lot of stuff sold to USA due to restrictive laws in Europe and reduced opportunities to shoot; for sure there is target shooting and hunting, but you have to put real effort and some money into participation. Hard to say how your gun got here. Enjoy it for what it is and where it is --- also, shoot something for the original owner's honor every now and again.