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Hammerhead · October 6, 2012, 07:51 AM

Not 100% sure about XD's, but with other brands you can't convert 9mm to 40 because of the narrower 9mm cut on the breach face. Some brands use smaller diameters of barrels as well on 9mms.

October 6, 2012, 07:51 AM	#2
Hammerhead Senior Member Join Date: May 31, 2004 Location: Minnesota Posts: 2,432	Not 100% sure about XD's, but with other brands you can't convert 9mm to 40 because of the narrower 9mm cut on the breach face. Some brands use smaller diameters of barrels as well on 9mms.