From what I've researched, it seems like you are only supposed to go down in barrel size, not up. So my XD40 can go down to 9mm, but 9mm isn't supposed to up to 40. I don't really understand why as from my understanding the frame on the 9 and the 40 is the same. I found a lot of info as far as barrel conversion on xdtalk.com
txjustin...the drop in barrel is all you need to change calibers, but you'll need mags unless you want to modify them...the 40 mag will not reliably feed 9mm rounds...i found several sites and reports of issues with this and only one person who said they had no trouble at all, because they modified the magazine....lol
txjustin...the drop in barrel is all you need to change calibers, but you'll need mags unless you want to modify them...the 40 mag will not reliably feed 9mm rounds...i found several sites and reports of issues with this and only one person who said they had no trouble at all, because they modified the magazine....lol
Chief do you know if by chance you could put a 4" compact barrel for a 9 or a 40 in a 3" sub-compact frame and slide?