@Professor I’ve seen many 38 Super/9mm conversions using only a barrel change, same with 10mm/40sw . I can’t recall a 45acp with anything other than 400 Corbon. I think it has to do with diameter of barrels with the slide internal size. I know if one could do it without a slide change, it would have been done. I don’t know if any platform has as much customization available the 1911 has.
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