I know this has been a thread on here, even as of last year. I still have the wondering question. With the availability of Ammo being scarce now, but more along the line of ammo being more expensive, .22lr is becoming more of an option to train with your P320. For most of the popular handgun Models out there, they all have some sort of .22lr option. Even Glock has introduced their .22 model that they can train with to train with Lower cost ammo. I have not seen any announcements from Sig talking about a P320 and a .22lr Model or conversion kit. I have seen reference that striker fired pistols do not work with with .22lr, but many other companies are doing this. I would think Glock would be a good example.