ORIGINAL: Briman
The M48 is different than other mauser 98s in that it has a notch milled in the barrel breech for the extractor just leke a 1903 springfield or Winchester Model 70. Any barrel that is threaded to fit a large ring mauser will fit the action, but it will need some machine work for the extractor groove.
Well thanks! I didn't know that. Good information to have!