Hi, rigbymauser, you will not be able to fit that original 10.75x68 magazine assembly into the Mauser standard size stock, as it is not only wider, but deeper too than the ones used for the standard cartridges like 7x64, 8x57 or the military magazines. The original 9.3x62 and 10.65x68 magazines use a longer trigger and a deeper stock than standard, both of the same proportions as the Magnum action stocks and triggers. It is an ideal size to build a true five-shot short magnum rifle, custom stocked of course. I hope that neither you nor your gunsmith go to the barbaric "solution" of shortening that rare magnum-size mag box to standard dimensions to fit it into a standard size stock.