The firing pin nuts are identical on all Mannlicher-Schoenauers from the 1903, military or sporting actions, to the last 1970 production "magnum" models, as are the firing pins, cocking pieces, main springs, safeties and bolt heads. The mil and civilian parts vary in decoration, checkering and knurling, only. In a pinch you may even substitute the striker and it's nut from an earlier Mannlicher turnbolt like the Dutch, Romanian or even German M88 action.