Gary Reeder
the main part I would worry about would be the extractor
Friday, June 08, 2018, 14:11

The 40 extractor is set up to extract a wider rim cartridge whereas the 9mm extractor is for the smaller rim of the 9mm. Also you would have to have a specific barrel listed as a 40 to 9mm. The 9mm barrel is thinner than the 40 and would be floppy in the slide. Lone Wolf has 9mm barrels to fit the internal space in the 40 slide.


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