fgr

I believe the "new" design was first patented by schmeisser in 1938. Indeed the early Haneal mags were stamped "Schmeisser Patent". Also the early haneal mags, (1939-1941) that were proofed "122" were stamped and formed and welded or brazed (according to Gortz) as the haneal factory did not have extrusion equipement. The later FXO mags (june 1941 onwards) were extruded and then the various post extrusion processes to trim, and form the feed lips, etc. were done. Both styles had different internals and bottoms than the preceeding sheetmetal mags.


The new design offered several improvements, a wider spring that provided more support to the follower. A central pin on the base that minimized the wobble and working of the base with usage, a one piece construction that, theoretically, was cheaper and stronger than the original design.


A good source is "Die Pistole 08" by Herr Joachim Gortz, pages 181 - 187... (in german.... TECHNICAL GERMAN)


GT is our resident mag expert and I assume he will correct and expand my brief explaination... but I hope this gives you a start on an answer... FGR