I keep seeing the .22 can I want pop up for sale on various sites but the wait for it to get to the dealer and then the wait for the stamp to come back keeps me from buying it. I'll just keep using my 9mm can for now.
I don't have the SDN6, I went with the Surefire SOCOM 762-RC mostly due to it's superior mounting system over the SDN6. That said, the SDN6 is quite a bit cheaper than the SOCOM.
If you ever shoot a .300blk suppressed, you'll never shoot it another way. SO quiet! Ammo, while more expensive than it's 5.56 counterpart, is available locally and online. Plus, reloading can be done with 5.56 brass.