My friend has a CAC9 can for a M11 that he got an adapter to shoot on his Uzi. He then threaded the end of his .22 barrel for it and it really works well. It's probably not as good as a .22 can but hey I could not tell. My next purchase will be a can for my Vector full size in 9mm, I just got the .22 kit and it will play double duty.
What can are you thinking about? I need to start looking.